IWC Ingenieur models by reference numbers

reference	name	movement	listed	case bracelet/strap	dials	measurements	remarks
666 A	Ingenieur Automatic	cal. 852 automatic	1954/55-1958/59	stainless steel on leather strap (stainless steel on steel bracelet) 18 ct. gold on leather strap	black silvered	ø: 36.5 mm h: 13.2 mm w: 46 g (steel on strap)	water resistant to 10 atm amagnetic to 80,000 A/m
666 A (=26662 or 56662)	Ingenieur Automatic	cal. 853 automatic	1959-1967	stainless steel on leather strap stainless steel on steel bracelet 18 ct. gold on leather strap	black silvered	ø: 36.5 mm h: 13.2 mm w: 46 g (steel on strap) 88 g (steel on steel)	water resistant to 10 atm amagnetic to 80,000 A/m also in the sixties briefly called ref. 26662 (gold) and 56662 (steel)
666 AD	Ingenieur Automatic Calendar	cal. 8521 automatic date	1954/55-1958/59	stainless steel on leather strap (stainless steel on steel bracelet) 18 ct. gold on leather strap	black silvered	ø: 36.5 mm h: 13.2 mm w: 46 g (steel on strap)	water resistant to 10 atm amagnetic to 80,000 A/m
666 AD (= 36661 or 66661)	Ingenieur Automatic Calendar	cal. 8531 automatic date	1959-1967	stainless steel on leather strap stainless steel on steel bracelet 18 ct. gold on leather strap	black silvered	ø: 36.5 mm h: 13.2 mm w: 46 g (steel on strap) 88 g (steel on steel)	water resistant to 10 atm amagnetic to 80,000 A/m optional magnifying lens over date also in the sixties briefly called ref. 36661 (gold) and 66661 (steel)
766 A	Ingenieur Automatic	cal. 852 automatic	1954/55-1958/59	14 ct. gold/steel back on leather strap	silvered [black]	ø: 36.5 mm h: 13.2 mm	water resistant to 10 atm amagnetic to 80,000 A/m
766 A (= 77662)	Ingenieur Automatic	cal. 853 automatic	1959-1967	14 ct. gold/steel back on leather strap	silvered [black]	ø: 36.5 mm h: 13.2 mm	water resistant to 10 atm amagnetic to 80,000 A/m also in the sixties briefly called ref. 77662
766 AD	Ingenieur Automatic Calendar	cal. 8521 automatic date	1954/55-1958/59	14 ct. gold/steel back on leather strap	silvered [black]	ø: 36.5 mm h: 13.2 mm	water resistant to 10 atm amagnetic to 80,000 A/m
766 AD (= 87661)	Ingenieur Automatic Calendar	cal. 8531 automatic date	1959-1967	14 ct. gold/steel back on leather strap	silvered [black]	ø: 36.5 mm h: 13.2 mm	water resistant to 10 atm amagnetic to 80,000 A/m optional magnifying lens over date also in the sixties briefly called ref. 87661
866 A (= 1908)	Ingenieur Automatic	cal. 854 cal. 854B automatic	1967-1970 1970-1976	stainless steel on croco strap stainless steel on steel bracelet 18 ct. gold on croco strap	anthracite gilt sunray silvered sunray [black, blue]	ø: 37 mm h: 13.2 mm	water resistant to 12 atm (gold model 6 atm) amagnetic to 80,000 A/m identical with ref. 1908 of new reference numbering scheme
866 AD (= 1808)	Ingenieur Automatic Calendar	cal. 8541 cal. 8541B automatic date	1967-1970 1970-1976	stainless steel on croco strap stainless steel on steel bracelet 18 ct. gold on croco strap	blue sunray gilt sunray silvered sunray anthracite [black]	ø: 37 mm h: 13.2 mm w: 56 g (SS/strap) 98 g (SS/SS)	water resistant to 12 atm (gold model 6 atm) amagnetic to 80,000 A/m identical with ref. 1808 of new reference numbering scheme
0914	Ingenieur SL Automatic (AKA "Skinny Ingenieur")	cal. 375 automatic date	ca. 1983-1984	18 ct. yellow gold gold on gold bracelet with diamonds on bracelet, bezel & dial (special setting)	gold (pavé)	ø: 34 mm h: 8.8 mm	special edition (probably 2 pieces) for Sultanate of Muscat and Oman movement based on ETA cal. 2892 case based on reference 9225 auctioned at Crott's on 7th May 2005 (case number 2,394,336)
1808 (= 866 AD)	Ingenieur Automatic Calendar	cal. 8541B automatic date	1970-1976	stainless steel on leather strap stainless steel on steel bracelet 18 ct. gold on leather strap	blue sunray gilt sunray silvered sunray (anthracite, black)	ø: 37 mm h: 13.2 mm w: 56 g (SS/strap) 98 g (SS/SS)	water resistant to 12 atm (gold model 6 atm) amagnetic to 80,000 A/m identical with ref. 866 AD of old reference numbering scheme
1832	Ingenieur SL (AKA "Jumbo" Ingenieur)	cal. 8541ES automatic date	1976-1983 (sold out by April 1984)	stainless steel on steel bracelet mixte (SS/14 ct. YG) on mixte bracelet	black gilt plated rhodium	ø: 38 x 40 mm h: 12.5 mm w: 155 g (SS/SS)	produced in 543 pieces amagnetic to 80,000 A/m water resistant to 12 atm cushioned movement
1908 (= 866 A)	Ingenieur Automatic	cal. 854B automatic	1967-1970 1970-1976	stainless steel on leather strap stainless steel on steel bracelet 18 ct. gold on leather strap	anthracite gilt sunray silvered sunray [black, blue]	ø: 37 mm h: 13.2 mm	identical with ref. 866 A of old numbering scheme water resistant to 12 atm (gold model 6 atm) amagnetic to 80,000 A/m
3003	Ingenieur SL Quartz (AKA «Jumbo Ingenieur»)	cal. 2405 quartz date	1976/77-1979	stainless steel on steel bracelet mixte (SS/14 ct. YG) on mixte bracelet	black (millimetre-structure) plated rhodium-flash gilt	ø: 38 x 40 mm h: 12.5 mm g: 152 g (SS/SS)	produced in 335 pieces water resistant to 12 atm amagnetic to 40,000 A/m cushioned movement mvmt. based on ETA quartz ebauche
3227	Ingenieur Automatic	cal. 80110 automatic date	2005-....	stainless steel on steel bracelet	black ardoise (limited edition «Collectors' Forum»)	ø: 42.5 mm h: 14.5 mm w: 216 g (SS/SS)	water resistant to 12 atm amagnetic to 80,000 A/m Pellaton automatic winding movement with shock-absorbing system antireflective sapphire glass
3227	Ingenieur Automatic AMG	cal. 80110 automatic date	2005-....	titanium on titanium bracelet titanium on soft strap	black rhodium plated (limited edition «CLS 55 AMG»)	ø: 42.5 mm h: 14.5 mm w: 154 g (Ti/Ti) w: 109 g (Ti/Strap)	water resistant to 12 atm amagnetic to 80,000 A/m Pellaton automatic winding movement with shock-absorbing system antireflective sapphire glass
3228	Ingenieur Automatic	cal. 80111 automatic date	2007-....	stainless steel on steel bracelet	silvered with red gilt indices	ø: 40 mm H: 13.5 mm G: 186 g (Stahl/Stahl)	water resistant to 12 atm Pellaton automatic winding movement with shock-absorbing system antireflective sapphire glass sapphire glass back
3234	Ingenieur Automatic	cal. 80111 automatic date	2007-....	stainless steel with two black ceramic bezels on soft strap	black	ø: 44 mm H: 14 mm G: 123 g (Ti/Softbandl)	water resistant to 12 atm Pellaton automatic winding movement with shock-absorbing system antireflective sapphire glass sapphire glass back
3303	Ingenieur SL Quartz (AKA «Jumbo Ingenieur»)	cal. 2250 quartz date	1980-1984/85	stainless steel on steel bracelet mixte (SS/14 ct. YG) on mixte bracelet	black plated rhodium flash gilt white - roman (enamelled)	ø: 38 x 40 mm h: 8.8 mm w: 140 g (mixte/mixte)	produced in 149 pieces amagnetic to 40,000 A/m water resistant to 12 atm cushioned movement mvmt. based on ETA quartz ebauche
3305	Ingenieur SL Quartz (AKA «Skinny Ingenieur»)	cal. 2250 quartz date	1981/82-1987	stainless steel on steel bracelet mixte (SS/14 ct. YG) on mixte bracelet mixte (SS/14 ct. YG bezel) on steel bracelet	black plated rhodium white - roman gilt	ø: 34 mm h: 8.8 mm ?	water resistant to 12 atm amagnetic to 40,000 A/m mvmt. based on ETA quartz ebauche
3315	Ingenieur SL Quartz (AKA «Skinny Ingenieur»)	cal. 2250 quartz date	1983-1987	stainless steel on leather or soft strap mixte (SS/14 ct. YG) on leather or soft strap 18 ct. YG on leather or soft strap	black plated rhodium white - roman gilt	ø: 34 mm h: 8.8 mm ?	water resistant to 12 atm amagnetic to 40,000 A/m mvmt. based on ETA quartz ebauche
3350	Ingenieur in Titanium	cal. 2210 quartz date	1985-1986	titanium on titanium bracelet mixte (Ti/18 ct. YG bezel) on titanium bracelet mixte (Ti/18 ct. YG) on mixte bracelet	black - military black plated rhodium white	ø: 32 mm h: 6.1 mm	water resistant to 12 atm amagnetic to 20,000 A/m mvmt. based on ESA calibre 255.411 first type of titanium bracelet, succeeded by ref. 3360 both mixte types also with Top Wesselton diamonds on bezel
3351	Ingenieur in 18 ct. Yellow Gold	cal. 2210 quartz date	1987	18 ct. yellow gold on leather strap (pushbutton safety clasp)	white [black] [plated rhodium] [gilt]	ø: 32 mm h: 6.1 mm	water resistant up to 3 atm amagnetic to 20,000 A/m mvmt. based on ESA calibre 255.411
3360	Ingenieur in Titanium	cal. 2210 quartz date	1987-1989	titanium on titanium bracelet mixte (Ti/18 ct. YG bezel) on titanium bracelet mixte (Ti/18 ct. YG bezel) with diamonds on titanium bracelet	black - military black plated rhodium white	ø: 32 mm h: 6.1 mm	water resistant to 12 atm amagnetic to 20,000 A/m 2nd type of tianitum bracelet, preceded by ref. 3350 mvmt. based on ESA calibre 255.411
3361	Ingenieur in Titanium	cal. 2210 quartz date	1987-1989	titanium on leather strap with pushbutton safety claps mixte (Ti/14 or 18 ct. YG bezel) on leather strap with pushbutton safety clasp	black - military plated rhodium white gilt	ø: 32 mm h: 6.1 mm	water resistant to 12 atm amagnetic to 20,000 A/m mvmt. based on ESA calibre 255.411
3505	Ingenieur SL Automatic (AKA «Skinny Ingenieur»)	cal. 375 automatic date	1983-1984/85	stainless steel on steel bracelet mixte (SS/14 ct. YG) on mixte bracelet	black plated rhodium [white] [gilt]	ø: 34 mm h: 8.8 mm w: 117 g (mixte/mixte)	water resistant to 12 atm amagnetic to 40,000 A/m movement based on ETA cal. 2892
3506	Ingenieur SL Automatic (AKA «Skinny Ingenieur»)	(cal. 3752) cal. 37531 automatic date	1985-1988/89	stainless on steel bracelet mixte (SS/14 ct. YG) on mixte bracelet mixte (SS/14 ct. YG bezel) on steel bracelet	black plated rhodium white [gilt]	ø: 34 mm h: 8.8 mm	water resistant to 12 atm amagnetic to 40,000 A/m movement based on ETA cal. 2892-A2
3508	Ingenieur 500,000 A/m	cal. 37590 automatic date	1989-1992	stainless steel on steel bracelet (614 pieces produced) mixte (SS/18 ct. YG bezel) on steel bracelet (290 piece produced) mixte (SS/14 ct. YG bezel) on steel bracelet (50 pieces produced + 1 on mixte bracelet)	black plated rhodium white gilt	ø: 34 mm h: 8.8 mm w: 100 g (SS/SS)	produced in ca. 955 pieces water resistant to 12 atm amagnetic to 500,000 A/m movement based on ETA cal. 2892-A2
3515	Ingenieur SL Automatic (AKA «Skinny Ingenieur»)	cal. 375 automatic date	1983-1984/85	stainless steel on leather or soft strap mixte (SS/14 ct. YG) on leather or soft strap 18 ct. yellow gold on leather or soft strap	black plated rhodium [white] [gilt]	ø: 34 mm h: 8.8 mm	water resistant to 12 atm amagnetic to 40,000 A/m movement based on ETA cal. 2892-A2
3516	Ingenieur SL Automatic (AKA «Skinny Ingenieur»)	(cal. 3752) cal. 37531 automatic date	1985-1988/89	stainless steel on leather or soft strap mixte (SS/14 ct. YG) on leather or soft strap 18 ct. yellow gold on leather or soft strap	black [and black military?] plated rhodium white gilt	ø: 34 mm h: 8.8 mm	water resistant to 12 atm amagnetic to 40,000 A/m movement based on ETA cal. 2892-A2
3518	Ingenieur 500,000 A/m	cal. 37590 automatic date	1989-1992	stainless steel on croco strap (158 pieces) mixte (SS/18 ct. YG bezel) on croco strap (42 pieces) 18 ct. yellow gold on croco strap (102 pieces) 18 ct. white gold on croco strap (25 pieces)	black plated rhodium white gilt	ø: 34 mm h: 8.8 mm w: 100 g (SS/SS)	produced in ca. 327 pieces water resistant to 12 atm amagnetic to 500,000 A/m movement based on ETA cal. 2892-A2 base reference 3508
3521	Ingenieur «Officially certified chronometer»	cal. 887 cal. 887/2 automatic date	1993-1995 1995-2000/01	stainless steel on steel bracelet mixte (SS/18 ct. bezel) on steel bracelet	black white gilt	ø: 34 mm h: 8.8 mm	water resistant to 12 atm amagnetic to 80,000 A/m cushioned movement magnifying lens over date movement based on JLC cal. 889
3522	Ingenieur «Officially certified chronometer»	cal. 887 automatic date	1993-1995/96	stainless steel on croco strap [mixte (SS/18 ct. bezel) on croco strap]	black white gilt	ø: 34 mm h: 8.8 mm	water resistant to 12 atm amagnetic to 80,000 A/m cushioned movement magnifying lens over date movement based on JLC cal. 889 base reference 3521
3540	Ingenieur SL Perpetual Calendar	cal. 37580 cal. 37582 perpetual	1987-1989/90 1989/90-1992	18 ct. yellow gold on croco strap	white mat [black]	ø: 34.5 mm	water resistant to 3 atm amagnetic to 40,000 A/m 2nd or 3rd version Da Vinci perpetual module movement based on ETA cal. 2892-A2 base reference 9245
3725	Ingenieur Chronograph	cal. 79350 automatic chronograph	2005-....	stainless steel on steel bracelet	black	ø: 42.5 mm h: 13.5 mm w: 205 g (SS/SS)	water resistant to 12 atm amagnetic to 80,000 A/m antireflective sapphire movement based on Valjoux cal. 7750
3725	Ingenieur Chronograph AMG	cal. 79350 automatic chronograph	2005-....	titanium on titanium bracelet titanium on soft strap	black	ø: 42.5 mm h: 13.5 mm w: 141 g (Ti/Ti) w: 95 g (Ti/Strap)	water resistant to 12 atm amagnetic to 80,000 A/m antireflective sapphire movement based on Valjoux cal. 7750
3733	Ingenieur Chronograph	cal. 631 meca-quartz chronograph date	1988-1992/93	stainless steel on leather strap mixte (SS/14 ct. YG bezel) on leather strap 18 ct. yellow gold on leather strap	black (gilt subdials) white	ø: 30 mm	water resistant to 3 atm mvmt. based on JLC cal. 630 base reference 3734
3734	Ingenieur Chronograph	cal. 631 meca-quartz chronograph date	1988-1992/93	stainless steel on steel bracelet mixte (SS/14 ct. YG bezel) on steel bracelet	black (gilt subdials) white	ø: 30 mm	water resistant to 3 atm mvmt. based on JLC cal. 630
3805	Ingenieur Chrono Alarm	cal. 633 meca-quartz chronograph date, alarm	1991-1997 (last sold in 2000)	stainless steel on steel bracelet mixte (SS/18 ct. YG bezel) on steel bracelet	black military white gilt	ø: 34 mm h: 9mm w: 99 g (SS/SS)	water resistant to 3 atm amagnetic to 4,800 A/m same watch on diamond bracelet (ref. no. unknown) mvmt. based on JLC cal. 630
3815	Ingenieur Chrono Alarm	cal. 633 meca-quartz chronograph date, alarm	1991-1996	stainless steel on leather strap mixte (SS/18 ct. YG bezel) on leather strap	black military white gilt	ø: 34 mm h: 8.8 mm	water resistant to 3 atm amagnetic to 4,800 A/m mvmt. based on JLC cal. 630 base reference 3815
4413	Ingenieur SL Automatic	cal. 320 (cal. 3201) automatic date	1986-1989	stainless steel on leather strap mixte (SS/14 ct. YG bezel) on leather strap 18 ct. yellow gold on leather strap	white plated rhodium black gilt	ø: 30 mm h: 7.2 mm ?	water resistant to 6 atm amagnetic to 40,000 A/m movment based on F Piguet 951=320, 952= 3201
4414	Ingenieur SL Automatic	cal. 320 (cal. 3201) automatic date	1986-1989	stainless steel on steel bracelet mixte (SS/14 ct. YG bezel) on steel bracelet mixte (SS/14 ct. YG bezel) on mixte bracelet	white plated rhodium black gilt	ø: 30 mm h: 7.2 mm ?	water resistant to 6 atm amagnetic to 40,000 A/m movement based on F Piguet 951=320, 952= 3201
4501	Ingenieur SL Quartz	cal. 2249 quartz date	1981-1986	stainless steel on croco strap mixte (SS/14 ct. YG bezel) on croco strap 18 ct. yellow gold on croco strap	black plated rhodium (white - roman) [gilt]	ø: 26 mm	water resistant to 5 or 6 atm amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111
4502	Ingenieur SL Quartz	cal. 2249 quartz date	1981-1986	stainless steel on steel bracelet mixte (SS/14 ct. YG bezel) on mixte bracelet	black plated rhodium white - roman [gilt]	ø: 26 mm	water resistant to 5 or 6 atm amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111
4503	Ingenieur SL Quartz	cal. 2249 quartz date	1980-1987	stainless steel on steel bracelet mixte (SS/14 ct. YG bezel) on mixte bracelet	black plated rhodium white - roman [gilt]	ø: 30 mm h: 7.2 mm	water resistant to 12 atm amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111
4508	Ingenieur SL Quartz «Titanium spanish olive»	cal. 2249 quartz date	1983-1985	titanium «spanish olive» on leather or soft strap	plated rhodium black gilt white enamelled (with or w/o tritium)	ø: 26 mm	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111
4509	Ingenieur SL Quartz «Titanium spanish olive»	cal. 2249 quartz date	1983-1984 (sold out by January 1985)	titanium «spanish olive» on leather or soft strap	plated rhodium black gilt white enamelled (with or w/o tritium)	ø: 30 mm h: 7.2 mm w: 28 g (Ti/Strap)	water resistant to 12 atm amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111
4513	Ingenieur SL Quartz	cal. 2249 quartz date	1982-1989	stainless steel on croco strap mixte (SS/14 ct. YG bezel) on croco strap 18 ct. yellow gold on croco strap	gilt white - roman [black] [plated rhodium]	ø: 30 mm h: 7.2 mm	water resistant to 12 atm (steel) water resistant to 6 atm (gold) amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111
4515	Ingenieur «Midsize»	cal. 30110 automatic date	2005-....	stainless steel on steel bracelet stainless steel on soft strap 18 ct. red gold on dark brown soft strap	silvered	ø: 34 mm h: 10 mm w: 132 g (SS/SS) w: 68 g (SS/Strap)	water resistant to 12 atm amagnetic to 4,800 A/m antireflective sapphire glass movement based on ETA 2892-A2
4550	Ingenieur in Titanium	cal. 2209 quartz date	1985-1989	titanium on titanium bracelet mixte (Ti/18 ct. YG bezel) on titanium bracelet mixte (Ti/18 ct. YG) on mixte bracelet both mixte versions also available with precious stones (diamonds)	black military black plated rhodium white [gilt]	ø: 25 mm	water resistant to 6 atm mvmt. based on ETA quartz ebauche
4551	Ingenieur in 18 ct. Yellow Gold	cal. 2209 quartz date	1987/88	18 ct. yellow gold on leather strap with pushbutton safety clasp	white [black] [plated rhodium] [gilt]	ø: 25 mm	water resistant to 3 atm mvmt. based on ETA quartz ebauche
4561	Ingenieur in Titanium	cal. 2209 quartz date	1988-1989	titanium on leather strap [mixte (Ti/18 ct.YG bezel) on leather strap]	black military [black] [plated rhodium] [white]	ø: 25 mm	water resistant to 6 atm mvmt. based on ETA quartz ebauche
5005	Big Ingenieur	cal. 51112 automatic date	2007-....	stainless steel on black croco strap	black	ø: 45.5 mm h: 15 mm w: 138 g	water resistant to 12 atm Pellaton automatic winding movement with 7 days power reserve antireflective sapphire sapphire glass back
5215	Ingenieur SL pocket watch	cal. 9520 manual winding	1982-1996	stainless steel	black plated rhodium white white - roman	ø: 50 mm h: 10 mm w: 84 g	water resistant to 3 atm amagnetic to 40,000 A/m cushioned movement
6703	Ingenieur SL Quartz	cal. 2249 quartz date	1980-1984	18 ct. yellow gold on gold bracelet	black gilt	ø: 30 mm h: 7.2 mm	water resistant to 6 atm amagnetic to 40,000 A/m cushioned movement mvmt. based on ESA quartz cal. 956-111 gold version of ref. 4503/4513 succeeded by ref. 6730
6704	Ingenieur SL Quartz	cal. 2249 quartz date	1981-1985 (sold out by July 1985)	18 ct. yellow gold on gold bracelet	[black] gilt	ø: 26 mm	water resistant to 5 or 6 atm amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111 gold version of ref. 4502/4501
6720	Ingenieur SL Quartz	cal. 2249 quartz date	ca. 1982-1985	18 ct. yellow gold on gold bracelet with diamonds on bezel	black plated rhodium gilt white enamelled (with or w/o tritium)	ø: 30 mm h: 7.2 mm	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111 45 diamonds on bezel (0.76 ct.)
6721	Ingenieur SL Quartz	cal. 2249 quartz date	1982-1986	18 ct. yellow gold gold on gold bracelet with diamonds on bracelet, bezel & dial	gold (pavé)	ø: 26 mm	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111
6724	Ingenieur SL Quartz	cal. 2249 quartz date	ca. 1982-1987 (not listed)	18 ct. yellow gold on gold bracelet with diamonds on bezel	gilt black	ø: 26 mm	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ESA quartz cal. 956-111
6727	Ingenieur in 18 ct. Yellow Gold	cal. 2209 quartz date	1985-1987 (sold out by August 1987)	18 ct. yellow gold on gold bracelet	gilt [white] [black] [plated rhodium]	ø: 25 mm	water resistant to 3 atm mvmt. based on ETA quartz ebauche
6730	Ingenieur SL Quartz	cal. 2249 quartz date	1984-1985	18 ct. yellow gold on gold bracelet	black gilt plated rhodium white enamelled (with or w/o tritium)	ø: 30 mm h: 7.2 mm	water resistant to 6 atm amagnetic to 40,000 A/m cushioned movement mvmt. based on ESA quartz cal. 956-111 gold version of ref. 4503/4513 preceded by ref. 6703
6753	Ingenieur in 18 ct. Yellow Gold	cal. 2209 quartz date	ca. 1985	18 ct. yellow gold on gold bracelet with diamonds on bezel und bracelet	onyx	ø: 25 mm	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ETA quartz ebauche
6757	Ingenieur in 18 ct. Yellow Gold	cal. 618 quartz moonphase	1987/88	18 ct. yellow gold on gold bracelet	white	ø: 25 or 26 mm	water resistant to 3 atm mvmt. based on JLC quartz ebauche
9033 AD	Ingenieur Automatic Calendar	cal. 8531 automatic date	1963?-1967	18 ct. yellow gold on gold bracelet	silvered	ø: 36.5 mm h: 13.2 mm	water resistant to 10 atm amagnetic to 80,000 A/m optional magnifying lens over date base reference 666 AD
9120 A	Ingenieur Automatic	cal. 854 cal. 854B automatic	1967/68-1969	18 ct. yellow gold on gold bracelet	silvered sunray gilt sunray anthracite [black]	ø: 37 mm h: 13.2 mm	water resistant to 6 atm amagnetic to 80,000 A/m base reference 866 A=1908
9120 AD	Ingenieur Automatic Calendar	cal. 8541 cal. 8541B automatic date	1967/68-1969	18 ct. yellow gold on gold bracelet	blue sunray gilt sunray silvered sunray anthracite [black]	ø: 37 mm h: 13.2 mm	amagnetic to 80,000 A/m water resistant to 6 atm base reference 866 AD=1808
9223	Ingenieur Automatic	cal. 375xx automatic date	ca. 1985-1988 (not listed)	18 ct. yellow gold on gold bracelet	black ...	ø: ca. 34 mm	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ETA cal. 2892-2 probably special edition for Sultanate of Oman (crest on dial)
9224	Ingenieur Automatic	cal. 375 x automatic date	ca. 1985-1988 (not listed)	18 ct. yellow gold on gold bracelet with diamonds on bezel (also fitting cuffs links, ring and key fob)	black ...	ø: ca. 34 mm	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ETA cal. 2892-2 probably special edition for Sultanate of Oman (crest on dial)
9225	Ingenieur SL Automatic (AKA «Skinny Ingenieur»)	cal. 375 automatic date	1983-1984	18 ct. yellow gold on gold bracelet	black gilt plated rhodium white enamelled (tritium & non-tritium)	ø: 34 mm h: 8.8 mm	water resistant to 6 atm amagnetic to 40,000 A/m movement based on ETA cal. 2892 base reference 3505 succeeded by reference 9230
9230	Ingenieur SL Automatic (AKA «Skinny Ingenieur»)	cal. 37521 automatic date	1984-1986	18 ct. yellow gold on gold bracelet	black gilt plated rhodium white enamelled (tritium & non-tritium)	ø: 34 mm h: 8.8 mm	water resistant to 6 atm amagnetic to 40,000 A/m movement based on ETA cal. 2892 base reference 3505 preceded by referenced 9225
9231	Ingenieur SL Automatic (AKA «Skinny Ingenieur»)	cal. 37521 automatic date	ca. 1985	18 ct. yellow gold on gold bracelet with diamonds on bezel	gilt ...	ø: 34 mm h: 8.8 mm	water resistant to 6 atm amagnetic to 40,000 A/m movement based on ETA cal. 2892 base reference 3505
9232	Ingenieur SL Automatic (AKA "Jumbo" Ingenieur)	cal. 8541ES automatic date	1977-1979	18 ct. yellow gold on gold bracelet	black gilt ...	ø: 38 x 40 mm h: 12.5 mm w: 285 g (??)	produced in 55 pieces amagnetic to 80,000 A/m water resistant to 6 atm cushioned movement
9236	Ingenieur SL Automatic (AKA «Skinny Ingenieur»)	(cal. 3752) cal. 37531 automatic date	ca. 1987-1989	18 ct. yellow gold on gold bracelet	gilt ...	ø: 34 mm h: 8.8 mm	water resistant to 6 (catalogue 12) atm amagnetic to 40,000 A/m mvmt. based on ETA cal. 2892-A2
9238	Ingenieur 500,000 A/m	cal. 37590 automatic date	1989-1992	18 ct. yellow gold on gold bracelet	black white gilt	ø: 34 mm h: 8.8 mm	produced in ca. 137 pieces water resistant to 6 atm amagnetic to 500,000 A/m movement based on ETA cal. 2892-A2 base reference 3508
9239	Ingenieur «Officially certified chronometer»	cal. 887 cal. 887/2 automatic date	1993-1995 1995-2000/01	18 ct. yellow gold on gold bracelet	black white gilt	ø: 34 mm h: 8.8 mm	water resistant to 6 atm amagnetic to 80,000 A/m cushioned movement magnifying lens over date movement based on JLC cal. 889 base reference 3521
9240	Ingenieur SL Perpetual Calendar	cal. 3757 perpetual	1985-1986	18 ct. yellow gold on gold bracelet	white mat [black]	ø: 34.5 mm	water resistant to 3 atm amagnetic to 40,000 a/m 1st version of Da Vinci perpetual module movement based on ETA cal. 2892-A2
9241	Ingenieur SL Perpetual Calendar	cal. 3757 perpetual	1987	18 ct. yellow gold on gold bracelet with diamonds on bezel	white mat [black]	ø: 34.5 mm	water resistant to 3 atm amagnetic to 40,000 a/m 1st version of Da Vinci perpetual module movement based on ETA cal. 2892-A2 same ref. no. used for Mark XII
9245	Ingenieur SL Perpetual Calendar	cal. 37580 cal. 37582 perpetual	1987-1989 1989-1992	18 ct. yellow gold on gold bracelet	white mat black	ø: 34.5 mm	water resistant to 3 atm amagnetic to 40,000 a/m 1st or 2nd version of Da Vinci perpetual module movement based on ETA cal. 2892-A2
9258	Ingenieur 500,000 A/m	cal. 37590 automatic date	1991-1993	18 ct. yellow gold on gold bracelet with diamonds	black white gilt	ø: 34 mm h: 8.8 mm	produced in 7 pieces water resistant to 6 atm amagnetic to 500,000 A/m movement based on ETA cal. 2892-A2 54 diamonds (0.64 ct.) base reference 3508
9259	Ingenieur «Officially certified chronometer»	cal. 887 cal. 887/2 automatic date	1993?-2001?	18 ct. yellow gold on gold bracelet with diamonds	gilt ....	ø: 34 mm h: 8.8 mm	water resistant to 6 atm amagnetic to 80,000 A/m cushioned movement, magnifying lens over date movement based on JLC cal. 889 base reference 3521
9260	Ingenieur SL Perpetual Calendar	cal. 37580 cal. 37582 perpetual	1987-1989 1989-1990	18 ct. yellow gold on gold bracelet with diamonds on bezel and bracelet	white mat [black]	ø: 34.5 mm	water resistant to 3 atm amagnetic to 40,000 a/m 1st or 2nd version of Da Vinc perpetual module movement based on ETA cal. 2892-A2 base reference 9245
9263	Ingenieur SL Perpetual Calendar	cal. 37580 cal. 37582 perpetual	1988-1989 1989-1991	18 ct. yellow gold on gold bracelet with diamonds on bezel	white mat [black]	ø: 34.5 mm	water resistant to 3 atm amagnetic to 40,000 a/m 1st or 2nd version of Da Vinci perpetual module movement based on ETA cal. 2892-A2 base reference 9245
9386 A	Ingenieur Automatic	cal. 853 automatic	1959?-1963?	18 ct. yellow gold on gold bracelet	silvered	ø: 36.5 mm h: 13.2 mm	water resistant to 10 atm amagnetic to 80,000 A/m (also in the sixties briefly called ref. 993862?) base reference 666 A
9386 AD (= 993861)	Ingenieur Automatic Calendar	cal. 8531 automatic date	1959?-1963?	18 ct. yellow gold on gold bracelet	silvered	ø: 36.5 mm h: 13.2 mm	water resistant to 10 atm amagnetic to 80,000 A/m optional magnifying lens over date in the sixties shortly called ref. 993861 base reference 666 AD
9503	Ingenieur SL Quartz (AKA «Jumbo Ingenieur»)	cal. 2405 quartz date	1976/77-1979	18 ct. yellow gold on gold bracelet	black (millimetre-structure) gilt [plated rhodium-flash]	ø: 38 x 40 mm h: 12.5 mm	produced in 45 pieces water resistant to 6 atm amagnetic to 40,000 A/m cushioned movement base reference 3003
9515	Ingenieur Chrono Alarm	cal. 633 meca-quartz chronograph date, alarm	1991-1996	18 ct. yellow gold on gold bracelet	black military white gilt	ø: 34 mm h: 8.8 mm	water resistant to 3 atm amagnetic to 4,800 A/m movement based on JLC cal. 630 same watch on diamond bracelet (ref. no. unknown) base reference 3508
9517	Ingenieur Chrono Alarm	cal. 633 meca-quartz chronograph date, alarm	ca. 1991-1996 (not listed)	18 ct. (white ?) gold on gold bracelet with diamonds on bezel	black military white gilt	ø: 34 mm h: 8.8 mm	water resistant to 3 atm amagnetic to 4,800 A/m movement based on JLC cal. 630 same watch on diamond bracelet (ref. no. unknown) base reference 3508
9533	Ingenieur Chronograph	cal. 631 chronograph date	1988-1992/93	18 ct. yellow gold on gold bracelet	black (gilt subdials) white	ø: 30 mm	water resistant to 3 atm mvmt. based on JLC cal. 630 base reference 3734
9652	Ingenieur in 18 ct. Yellow Gold	cal. 2250 quartz date	1984-1986	18 ct. yellow gold on gold bracelet with diamonds on bezel und bracelet	onyx	ø: ca 34 mm ?	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ETA quartz ebauche
9701	Ingenieur SL Quartz (AKA «Jumbo Ingenieur»)	cal. 2250 quartz date	1980-1983/84	18 ct. yellow gold on gold bracelet	black gilt white - roman ('enamelled')	ø: 38 x 40 mm h: 8.8 mm	produced in 56 pieces amagnetic to 40,000 A/m water resistant to 6 atm cushioned movement mvmt. based on ETA quartz ebauche base reference 3303
9703	Ingenieur SL Quartz (AKA «Skinny Ingenieur»)	cal. 2250 quartz date	ca. 1982-1984	18 ct. yellow gold on gold bracelet	black gilt white - roman	ø: 34 mm h: 8.8 mm	amagnetic to 40,000 A/m water resistant to 6 atm mvmt. based on ETA quartz ebauche base reference 3305
9720	Ingenieur SL Quartz (AKA «Jumbo Ingenieur»)	cal. 2250 quartz date	ca. 1983	18 ct. yellow gold on gold bracelet with diamonds	black gilt white - roman ('enamelled')	ø: 38 x 40 mm h: 8.8 mm	produced in 4 pieces amagnetic to 40,000 A/m water resistant to 6 atm cushioned movement 35 diamonds on bezel mvmt. based on ETA quartz ebauche base ref. 3303
9721	Ingenieur SL Quartz (AKA «Skinny Ingenieur»)	cal. 2250 quartz	1981/82-1987 (sold out by July 1985)	18 ct. yellow gold gold on gold bracelet with diamonds on bracelet, bezel & dial	gold (pavé)	ø: 34 mm h: 8.8 mm	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ETA quartz ebauche base reference 3305
9724	Ingenieur SL Quartz (AKA «Skinny Ingenieur»)	cal. 2250 quartz	ca. 1982-1985?	18 ct. yellow gold gold on gold bracelet with diamonds on bezel	black gilt plated rhodium white enamelled	ø: 34 mm h: 8.8 mm	water resistant to 6 atm amagnetic to 40,000 A/m mvmt. based on ETA quartz ebauche
9727	Ingenieur in 18 ct. Yellow Gold	cal. 2210 quartz date	1985-1987	18 ct. yellow gold on gold bracelet	gilt white [black] [plated rhodium]	ø: 32 mm h: 6.1 mm ?	water resistant up to 3 atm amagnetic to 20,000 A/m mvmt. based on ESA calibre 255.411
9730	Ingenieur SL Quartz (AKA «Skinny Ingenieur»)	cal. 2250 quartz date	1980?-1985	18 ct. yellow gold on gold bracelet	gilt [white] [black] [plated rhodium]	ø: 34 mm h: 8.8 mm	amagnetic to 40,000 A/m water resistant to 6 atm mvmt. based on ETA quartz ebauche base reference 3305
9737	Ingenieur in 18 ct. Yellow Gold	cal. 2210 quartz date	ca. 1986 (not listed)	18 ct. yellow gold on gold bracelet with diamonds	[gilt] [white] [black] [plated rhodium]	ø: 32 mm h: 6.1 mm ?	water resistant up to 3 atm amagnetic to 20,000 A/m mvmt. based on ESA calibre 255.411

picture

(click on thumbnail for enlarged version)

reference

name

movement

listed

case

bracelet/strap

dials

measurements

remarks

666 A

Ingenieur Automatic

cal. 852

automatic

1954/55-1958/59

stainless steel on leather strap

(stainless steel on steel bracelet)

18 ct. gold on leather strap

black

silvered

ø: 36.5 mm

h: 13.2 mm

w: 46 g (steel on strap)

water resistant to 10 atm

amagnetic to 80,000 A/m

666 A

(=26662

or 56662)

Ingenieur Automatic

cal. 853

automatic

1959-1967

stainless steel on leather strap

stainless steel on steel bracelet

18 ct. gold on leather strap

black

silvered

ø: 36.5 mm

h: 13.2 mm

w: 46 g (steel on strap)
88 g (steel on steel)

water resistant to 10 atm

amagnetic to 80,000 A/m

also in the sixties briefly called
ref. 26662 (gold) and 56662 (steel)

666 AD

Ingenieur Automatic Calendar

cal. 8521

automatic

date

1954/55-1958/59

stainless steel on leather strap

(stainless steel on steel bracelet)

18 ct. gold on leather strap

black

silvered

ø: 36.5 mm

h: 13.2 mm

w: 46 g (steel on strap)

water resistant to 10 atm

amagnetic to 80,000 A/m

666 AD

(= 36661

or 66661)

Ingenieur Automatic Calendar

cal. 8531

automatic

date

1959-1967

stainless steel on leather strap

stainless steel on steel bracelet

18 ct. gold on leather strap

black

silvered

ø: 36.5 mm

h: 13.2 mm

w: 46 g (steel on strap)
88 g (steel on steel)

water resistant to 10 atm

amagnetic to 80,000 A/m

optional magnifying lens over date

also in the sixties briefly called
ref. 36661 (gold) and 66661 (steel)

766 A

Ingenieur Automatic

cal. 852

automatic

1954/55-1958/59

14 ct. gold/steel back on leather strap

silvered

[black]

ø: 36.5 mm

h: 13.2 mm

water resistant to 10 atm

amagnetic to 80,000 A/m

766 A

(= 77662)

Ingenieur Automatic

cal. 853

automatic

1959-1967

14 ct. gold/steel back on leather strap

silvered

[black]

ø: 36.5 mm

h: 13.2 mm

water resistant to 10 atm

amagnetic to 80,000 A/m

also in the sixties briefly called
ref. 77662

766 AD

Ingenieur Automatic Calendar

cal. 8521

automatic

date

1954/55-1958/59

14 ct. gold/steel back on leather strap

silvered

[black]

ø: 36.5 mm

h: 13.2 mm

water resistant to 10 atm

amagnetic to 80,000 A/m

766 AD

(= 87661)

Ingenieur Automatic Calendar

cal. 8531

automatic

date

1959-1967

14 ct. gold/steel back on leather strap

silvered

[black]

ø: 36.5 mm

h: 13.2 mm

water resistant to 10 atm

amagnetic to 80,000 A/m

optional magnifying lens over date

also in the sixties briefly called
ref. 87661

866 A

(= 1908)

Ingenieur Automatic

cal. 854

cal. 854B

automatic

1967-1970

1970-1976

stainless steel on croco strap

stainless steel on steel bracelet

18 ct. gold on croco strap

anthracite

gilt sunray

silvered sunray

[black, blue]

ø: 37 mm

h: 13.2 mm

water resistant to 12 atm
(gold model 6 atm)

amagnetic to 80,000 A/m

identical with ref. 1908
of new reference numbering scheme

866 AD

(= 1808)

Ingenieur Automatic Calendar

cal. 8541

cal. 8541B

automatic

date

1967-1970

1970-1976

stainless steel on croco strap

stainless steel on steel bracelet

18 ct. gold on croco strap

blue sunray

gilt sunray

silvered sunray

anthracite [black]

ø: 37 mm

h: 13.2 mm

w: 56 g (SS/strap)
98 g (SS/SS)

water resistant to 12 atm
(gold model 6 atm)

amagnetic to 80,000 A/m

identical with ref. 1808 of new
reference numbering scheme

0914

Ingenieur SL Automatic

(AKA "Skinny Ingenieur")

cal. 375

automatic

date

ca. 1983-1984

18 ct. yellow gold gold on gold bracelet
with diamonds on bracelet, bezel & dial
(special setting)

gold (pavé)

ø: 34 mm

h: 8.8 mm

special edition (probably 2 pieces)
for Sultanate of Muscat and Oman

movement based on ETA cal. 2892
case based on reference 9225

auctioned at Crott's on 7th May 2005
(case number 2,394,336)

1808

(= 866 AD)

Ingenieur Automatic Calendar

cal. 8541B

automatic

date

1970-1976

stainless steel on leather strap

stainless steel on steel bracelet

18 ct. gold on leather strap

blue sunray

gilt sunray

silvered sunray

(anthracite, black)

ø: 37 mm

h: 13.2 mm

w: 56 g (SS/strap)
98 g (SS/SS)

water resistant to 12 atm
(gold model 6 atm)

amagnetic to 80,000 A/m

identical with ref. 866 AD of old
reference numbering scheme

1832

Ingenieur SL

(AKA "Jumbo" Ingenieur)

cal. 8541ES

automatic

date

1976-1983

(sold out by April 1984)

stainless steel on steel bracelet

mixte (SS/14 ct. YG) on mixte bracelet

black

gilt

plated rhodium

ø: 38 x 40 mm

h: 12.5 mm

w: 155 g (SS/SS)

produced in 543 pieces

amagnetic to 80,000 A/m

water resistant to 12 atm

cushioned movement

1908

(= 866 A)

Ingenieur Automatic

cal. 854B

automatic

1967-1970

1970-1976

stainless steel on leather strap

stainless steel on steel bracelet

18 ct. gold on leather strap

anthracite

gilt sunray

silvered sunray

[black, blue]

ø: 37 mm

h: 13.2 mm

identical with ref. 866 A
of old numbering scheme

water resistant to 12 atm
(gold model 6 atm)

amagnetic to 80,000 A/m

3003

Ingenieur SL Quartz

(AKA «Jumbo Ingenieur»)

cal. 2405

quartz

date

1976/77-1979

stainless steel on steel bracelet

mixte (SS/14 ct. YG) on mixte bracelet

black
(millimetre-structure)

plated rhodium-flash

gilt

ø: 38 x 40 mm

h: 12.5 mm

g: 152 g (SS/SS)

produced in 335 pieces

water resistant to 12 atm
amagnetic to 40,000 A/m
cushioned movement

mvmt. based on ETA quartz ebauche

3227

Ingenieur Automatic

cal. 80110

automatic

date

2005-....

stainless steel on steel bracelet

black

ardoise
(limited edition
«Collectors' Forum»)

ø: 42.5 mm

h: 14.5 mm

w: 216 g (SS/SS)

water resistant to 12 atm
amagnetic to 80,000 A/m

Pellaton automatic winding movement with shock-absorbing system

antireflective sapphire glass

3227

Ingenieur
Automatic AMG

cal. 80110

automatic

date

2005-....

titanium on titanium bracelet

titanium on soft strap

black

rhodium plated
(limited edition
«CLS 55 AMG»)

ø: 42.5 mm

h: 14.5 mm

w: 154 g (Ti/Ti)
w: 109 g (Ti/Strap)

water resistant to 12 atm
amagnetic to 80,000 A/m

Pellaton automatic winding movement with shock-absorbing system

antireflective sapphire glass

3228

Ingenieur
Automatic

cal. 80111

automatic

date

2007-....

stainless steel on steel bracelet

silvered
with red gilt indices

ø: 40 mm

H: 13.5 mm

G: 186 g (Stahl/Stahl)

water resistant to 12 atm

Pellaton automatic winding movement with shock-absorbing system

antireflective sapphire glass
sapphire glass back

3234

Ingenieur
Automatic

cal. 80111

automatic

date

2007-....

stainless steel
with two black ceramic bezels
on soft strap

black

ø: 44 mm

H: 14 mm

G: 123 g (Ti/Softbandl)

water resistant to 12 atm

Pellaton automatic winding movement with shock-absorbing system

antireflective sapphire glass
sapphire glass back

3303

Ingenieur SL Quartz

(AKA «Jumbo Ingenieur»)

cal. 2250

quartz

date

1980-1984/85

stainless steel on steel bracelet

mixte (SS/14 ct. YG) on mixte bracelet

black

plated rhodium flash

gilt

white - roman
(enamelled)

ø: 38 x 40 mm

h: 8.8 mm

w: 140 g (mixte/mixte)

produced in 149 pieces

amagnetic to 40,000 A/m
water resistant to 12 atm

cushioned movement

mvmt. based on ETA quartz ebauche

3305

Ingenieur SL Quartz

(AKA «Skinny Ingenieur»)

cal. 2250

quartz

date

1981/82-1987

stainless steel on steel bracelet

mixte (SS/14 ct. YG) on mixte bracelet

mixte (SS/14 ct. YG bezel) on steel bracelet

black

plated rhodium

white - roman

gilt

ø: 34 mm

h: 8.8 mm ?

water resistant to 12 atm

amagnetic to 40,000 A/m

mvmt. based on ETA quartz ebauche

3315

Ingenieur SL Quartz

(AKA «Skinny Ingenieur»)

cal. 2250

quartz

date

1983-1987

stainless steel on leather or soft strap

mixte (SS/14 ct. YG) on leather or soft strap

18 ct. YG on leather or soft strap

black

plated rhodium

white - roman

gilt

ø: 34 mm

h: 8.8 mm ?

water resistant to 12 atm

amagnetic to 40,000 A/m

mvmt. based on ETA quartz ebauche

3350

Ingenieur in Titanium

cal. 2210

quartz

date

1985-1986

titanium on titanium bracelet

mixte (Ti/18 ct. YG bezel)
on titanium bracelet

mixte (Ti/18 ct. YG) on mixte bracelet

black - military

black

plated rhodium

white

ø: 32 mm

h: 6.1 mm

water resistant to 12 atm
amagnetic to 20,000 A/m
mvmt. based on ESA calibre 255.411

first type of titanium bracelet,
succeeded by ref. 3360

both mixte types also with
Top Wesselton diamonds on bezel

3351

Ingenieur
in 18 ct. Yellow Gold

cal. 2210

quartz

date

1987

18 ct. yellow gold on leather strap
(pushbutton safety clasp)

white

[black]

[plated rhodium]

[gilt]

ø: 32 mm

h: 6.1 mm

water resistant up to 3 atm

amagnetic to 20,000 A/m

mvmt. based on ESA calibre 255.411

3360

Ingenieur in Titanium

cal. 2210

quartz

date

1987-1989

titanium on titanium bracelet

mixte (Ti/18 ct. YG bezel)
on titanium bracelet

mixte (Ti/18 ct. YG bezel) with diamonds on titanium bracelet

black - military

black

plated rhodium

white

ø: 32 mm

h: 6.1 mm

water resistant to 12 atm
amagnetic to 20,000 A/m

2nd type of tianitum bracelet,
preceded by ref. 3350

mvmt. based on ESA calibre 255.411

3361

Ingenieur in Titanium

cal. 2210

quartz

date

1987-1989

titanium on leather strap with pushbutton safety claps

mixte (Ti/14 or 18 ct. YG bezel)
on leather strap with pushbutton safety clasp

black - military

plated rhodium

white

gilt

ø: 32 mm

h: 6.1 mm

water resistant to 12 atm

amagnetic to 20,000 A/m

mvmt. based on ESA calibre 255.411

3505

Ingenieur SL Automatic

(AKA «Skinny Ingenieur»)

cal. 375

automatic

date

1983-1984/85

stainless steel on steel bracelet

mixte (SS/14 ct. YG) on mixte bracelet

black

plated rhodium

[white]

[gilt]

ø: 34 mm

h: 8.8 mm

w: 117 g (mixte/mixte)

water resistant to 12 atm

amagnetic to 40,000 A/m

movement based on ETA cal. 2892

3506

Ingenieur SL Automatic

(AKA «Skinny Ingenieur»)

(cal. 3752)

cal. 37531

automatic

date

1985-1988/89

stainless on steel bracelet

mixte (SS/14 ct. YG) on mixte bracelet

mixte (SS/14 ct. YG bezel) on steel bracelet

black

plated rhodium

white

[gilt]

ø: 34 mm

h: 8.8 mm

water resistant to 12 atm

amagnetic to 40,000 A/m

movement based on ETA cal. 2892-A2

3508

Ingenieur 500,000 A/m

cal. 37590

automatic

date

1989-1992

stainless steel on steel bracelet
(614 pieces produced)

mixte (SS/18 ct. YG bezel) on steel bracelet (290 piece produced)

mixte (SS/14 ct. YG bezel) on steel bracelet (50 pieces produced + 1 on mixte bracelet)

black

plated rhodium

white

gilt

ø: 34 mm

h: 8.8 mm

w: 100 g (SS/SS)

produced in ca. 955 pieces

water resistant to 12 atm

amagnetic to 500,000 A/m

movement based on ETA cal. 2892-A2

3515

Ingenieur SL Automatic

(AKA «Skinny Ingenieur»)

cal. 375

automatic

date

1983-1984/85

stainless steel on leather or soft strap

mixte (SS/14 ct. YG) on leather or soft strap

18 ct. yellow gold on leather or soft strap

black

plated rhodium

[white]

[gilt]

ø: 34 mm

h: 8.8 mm

water resistant to 12 atm

amagnetic to 40,000 A/m

movement based on ETA cal. 2892-A2

3516

Ingenieur SL Automatic

(AKA «Skinny Ingenieur»)

(cal. 3752)

cal. 37531

automatic

date

1985-1988/89

stainless steel on leather or soft strap

mixte (SS/14 ct. YG) on leather or soft strap

18 ct. yellow gold on leather or soft strap

black
[and black military?]

plated rhodium

white

gilt

ø: 34 mm

h: 8.8 mm

water resistant to 12 atm

amagnetic to 40,000 A/m

movement based on ETA cal. 2892-A2

3518

Ingenieur 500,000 A/m

cal. 37590

automatic

date

1989-1992

stainless steel on croco strap (158 pieces)

mixte (SS/18 ct. YG bezel) on croco strap
(42 pieces)

18 ct. yellow gold on croco strap (102 pieces)

18 ct. white gold on croco strap (25 pieces)

black

plated rhodium

white

gilt

ø: 34 mm

h: 8.8 mm

w: 100 g (SS/SS)

produced in ca. 327 pieces

water resistant to 12 atm
amagnetic to 500,000 A/m

movement based on ETA cal. 2892-A2

base reference 3508

3521

Ingenieur
«Officially certified chronometer»

cal. 887

cal. 887/2

automatic

date

1993-1995

1995-2000/01

stainless steel on steel bracelet

mixte (SS/18 ct. bezel) on steel bracelet

black

white

gilt

ø: 34 mm

h: 8.8 mm

water resistant to 12 atm
amagnetic to 80,000 A/m
cushioned movement
magnifying lens over date

movement based on JLC cal. 889

3522

Ingenieur
«Officially certified chronometer»

cal. 887

automatic

date

1993-1995/96

stainless steel on croco strap

[mixte (SS/18 ct. bezel) on croco strap]

black

white

gilt

ø: 34 mm

h: 8.8 mm

water resistant to 12 atm
amagnetic to 80,000 A/m
cushioned movement
magnifying lens over date

movement based on JLC cal. 889

base reference 3521

3540

Ingenieur SL
Perpetual Calendar

cal. 37580

cal. 37582

perpetual

1987-1989/90

1989/90-1992

18 ct. yellow gold on croco strap

white mat

[black]

ø: 34.5 mm

water resistant to 3 atm

amagnetic to 40,000 A/m

2nd or 3rd version Da Vinci perpetual module
movement based on ETA cal. 2892-A2

base reference 9245

3725

Ingenieur
Chronograph

cal. 79350

automatic

chronograph

2005-....

stainless steel on steel bracelet

black

ø: 42.5 mm

h: 13.5 mm

w: 205 g (SS/SS)

water resistant to 12 atm

amagnetic to 80,000 A/m

antireflective sapphire

movement based on Valjoux cal. 7750

3725

Ingenieur
Chronograph AMG

cal. 79350

automatic

chronograph

2005-....

titanium on titanium bracelet

titanium on soft strap

black

ø: 42.5 mm

h: 13.5 mm

w: 141 g (Ti/Ti)
w: 95 g (Ti/Strap)

water resistant to 12 atm

amagnetic to 80,000 A/m

antireflective sapphire

movement based on Valjoux cal. 7750

3733

Ingenieur Chronograph

cal. 631

meca-quartz

chronograph

date

1988-1992/93

stainless steel on leather strap

mixte (SS/14 ct. YG bezel) on leather strap

18 ct. yellow gold on leather strap

black (gilt subdials)

white

ø: 30 mm

water resistant to 3 atm

mvmt. based on JLC cal. 630

base reference 3734

3734

Ingenieur Chronograph

cal. 631

meca-quartz

chronograph

date

1988-1992/93

stainless steel on steel bracelet

mixte (SS/14 ct. YG bezel) on steel bracelet

black (gilt subdials)

white

ø: 30 mm

water resistant to 3 atm

mvmt. based on JLC cal. 630

3805

Ingenieur Chrono Alarm

cal. 633

meca-quartz

chronograph

date, alarm

1991-1997

(last sold in 2000)

stainless steel on steel bracelet

mixte (SS/18 ct. YG bezel) on steel bracelet

black military

white

gilt

ø: 34 mm

h: 9mm

w: 99 g (SS/SS)

water resistant to 3 atm

amagnetic to 4,800 A/m

same watch on diamond bracelet
(ref. no. unknown)

mvmt. based on JLC cal. 630

3815

Ingenieur Chrono Alarm

cal. 633

meca-quartz

chronograph

date, alarm

1991-1996

stainless steel on leather strap

mixte (SS/18 ct. YG bezel) on leather strap

black military

white

gilt

ø: 34 mm

h: 8.8 mm

water resistant to 3 atm

amagnetic to 4,800 A/m

mvmt. based on JLC cal. 630

base reference 3815

4413

Ingenieur SL Automatic

cal. 320

(cal. 3201)

automatic

date

1986-1989

stainless steel on leather strap

mixte (SS/14 ct. YG bezel) on leather strap

18 ct. yellow gold on leather strap

white

plated rhodium

black

gilt

ø: 30 mm

h: 7.2 mm ?

water resistant to 6 atm

amagnetic to 40,000 A/m

movment based on
F Piguet 951=320, 952= 3201

4414

Ingenieur SL Automatic

cal. 320

(cal. 3201)

automatic

date

1986-1989

stainless steel on steel bracelet

mixte (SS/14 ct. YG bezel)
on steel bracelet

mixte (SS/14 ct. YG bezel)
on mixte bracelet

white

plated rhodium

black

gilt

ø: 30 mm

h: 7.2 mm ?

water resistant to 6 atm

amagnetic to 40,000 A/m

movement based on
F Piguet 951=320, 952= 3201

4501

Ingenieur SL Quartz

cal. 2249

quartz

date

1981-1986

stainless steel on croco strap

mixte (SS/14 ct. YG bezel)
on croco strap

18 ct. yellow gold on croco strap

black

plated rhodium

(white - roman)

[gilt]

ø: 26 mm

water resistant to 5 or 6 atm

amagnetic to 40,000 A/m

mvmt. based on ESA quartz cal. 956-111

4502

Ingenieur SL Quartz

cal. 2249

quartz

date

1981-1986

stainless steel on steel bracelet

mixte (SS/14 ct. YG bezel)
on mixte bracelet

black

plated rhodium

white - roman

[gilt]

ø: 26 mm

water resistant to 5 or 6 atm

amagnetic to 40,000 A/m

mvmt. based on ESA quartz cal. 956-111

4503

Ingenieur SL Quartz

cal. 2249

quartz

date

1980-1987

stainless steel on steel bracelet

mixte (SS/14 ct. YG bezel)
on mixte bracelet

black

plated rhodium

white - roman

[gilt]

ø: 30 mm

h: 7.2 mm

water resistant to 12 atm

amagnetic to 40,000 A/m

mvmt. based on ESA quartz cal. 956-111

4508

Ingenieur SL Quartz

«Titanium spanish olive»

cal. 2249

quartz

date

1983-1985

titanium «spanish olive»
on leather or soft strap

plated rhodium

black

gilt

white enamelled
(with or w/o tritium)

ø: 26 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on ESA quartz cal. 956-111

4509

Ingenieur SL Quartz

«Titanium spanish olive»

cal. 2249

quartz

date

1983-1984

(sold out by January 1985)

titanium «spanish olive»
on leather or soft strap

plated rhodium

black

gilt

white enamelled
(with or w/o tritium)

ø: 30 mm

h: 7.2 mm

w: 28 g (Ti/Strap)

water resistant to 12 atm

amagnetic to 40,000 A/m

mvmt. based on ESA quartz cal. 956-111

4513

Ingenieur SL Quartz

cal. 2249

quartz

date

1982-1989

stainless steel on croco strap

mixte (SS/14 ct. YG bezel)
on croco strap

18 ct. yellow gold on croco strap

gilt

white - roman

[black]

[plated rhodium]

ø: 30 mm

h: 7.2 mm

water resistant to 12 atm (steel)
water resistant to 6 atm (gold)

amagnetic to 40,000 A/m

mvmt. based on ESA quartz cal. 956-111

4515

Ingenieur «Midsize»

cal. 30110

automatic

date

2005-....

stainless steel on steel bracelet

stainless steel on soft strap

18 ct. red gold on dark brown soft strap

silvered

ø: 34 mm

h: 10 mm

w: 132 g (SS/SS)
w: 68 g (SS/Strap)

water resistant to 12 atm

amagnetic to 4,800 A/m

antireflective sapphire glass

movement based on ETA 2892-A2

4550

Ingenieur in Titanium

cal. 2209

quartz

date

1985-1989

titanium on titanium bracelet

mixte (Ti/18 ct. YG bezel) on titanium bracelet

mixte (Ti/18 ct. YG) on mixte bracelet

both mixte versions also available with precious stones (diamonds)

black military
black

plated rhodium

white

[gilt]

ø: 25 mm

water resistant to 6 atm

mvmt. based on ETA quartz ebauche

4551

Ingenieur
in 18 ct. Yellow Gold

cal. 2209

quartz

date

1987/88

18 ct. yellow gold on leather strap
with pushbutton safety clasp

white

[black]

[plated rhodium]

[gilt]

ø: 25 mm

water resistant to 3 atm

mvmt. based on ETA quartz ebauche

4561

Ingenieur in Titanium

cal. 2209

quartz

date

1988-1989

titanium on leather strap

[mixte (Ti/18 ct.YG bezel)
on leather strap]

black military

[black]

[plated rhodium]

[white]

ø: 25 mm

water resistant to 6 atm

mvmt. based on ETA quartz ebauche

5005

Big Ingenieur

cal. 51112

automatic

date

2007-....

stainless steel on black croco strap

black

ø: 45.5 mm

h: 15 mm

w: 138 g

water resistant to 12 atm

Pellaton automatic winding movement
with 7 days power reserve

antireflective sapphire
sapphire glass back

5215

Ingenieur SL
pocket watch

cal. 9520

manual winding

1982-1996

stainless steel

black

plated rhodium

white

white - roman

ø: 50 mm

h: 10 mm

w: 84 g

water resistant to 3 atm

amagnetic to 40,000 A/m

cushioned movement

6703

Ingenieur SL Quartz

cal. 2249

quartz

date

1980-1984

18 ct. yellow gold on gold bracelet

black

gilt

ø: 30 mm

h: 7.2 mm

water resistant to 6 atm
amagnetic to 40,000 A/m
cushioned movement

mvmt. based on ESA quartz cal. 956-111

gold version of ref. 4503/4513
succeeded by ref. 6730

6704

Ingenieur SL Quartz

cal. 2249

quartz

date

1981-1985

(sold out
by July 1985)

18 ct. yellow gold on gold bracelet

[black]

gilt

ø: 26 mm

water resistant to 5 or 6 atm

amagnetic to 40,000 A/m

mvmt. based on ESA quartz cal. 956-111

gold version of ref. 4502/4501

6720

Ingenieur SL Quartz

cal. 2249

quartz

date

ca. 1982-1985

18 ct. yellow gold on gold bracelet
with diamonds on bezel

black

plated rhodium

gilt

white enamelled
(with or w/o tritium)

ø: 30 mm

h: 7.2 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on ESA quartz cal. 956-111

45 diamonds on bezel (0.76 ct.)

6721

Ingenieur SL Quartz

cal. 2249

quartz

date

1982-1986

18 ct. yellow gold gold
on gold bracelet
with diamonds on bracelet, bezel & dial

gold (pavé)

ø: 26 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on
ESA quartz cal. 956-111

6724

Ingenieur SL Quartz

cal. 2249

quartz

date

ca. 1982-1987

(not listed)

18 ct. yellow gold on gold bracelet
with diamonds on bezel

gilt

black

ø: 26 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on ESA quartz cal. 956-111

6727

Ingenieur
in 18 ct. Yellow Gold

cal. 2209

quartz

date

1985-1987

(sold out by August 1987)

18 ct. yellow gold on gold bracelet

gilt

[white]

[black]

[plated rhodium]

ø: 25 mm

water resistant to 3 atm

mvmt. based on ETA quartz ebauche

6730

Ingenieur SL Quartz

cal. 2249

quartz

date

1984-1985

18 ct. yellow gold on gold bracelet

black

gilt

plated rhodium

white enamelled
(with or w/o tritium)

ø: 30 mm

h: 7.2 mm

water resistant to 6 atm
amagnetic to 40,000 A/m
cushioned movement

mvmt. based on ESA quartz cal. 956-111

gold version of ref. 4503/4513
preceded by ref. 6703

6753

Ingenieur
in 18 ct. Yellow Gold

cal. 2209

quartz

date

ca. 1985

18 ct. yellow gold on gold bracelet
with diamonds on bezel und bracelet

onyx

ø: 25 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on ETA quartz ebauche

6757

Ingenieur
in 18 ct. Yellow Gold

cal. 618

quartz

moonphase

1987/88

18 ct. yellow gold on gold bracelet

white

ø: 25 or 26 mm

water resistant to 3 atm

mvmt. based on JLC quartz ebauche

9033 AD

Ingenieur Automatic Calendar

cal. 8531

automatic

date

1963?-1967

18 ct. yellow gold on gold bracelet

silvered

ø: 36.5 mm

h: 13.2 mm

water resistant to 10 atm

amagnetic to 80,000 A/m

optional magnifying lens over date

base reference 666 AD

9120 A

Ingenieur Automatic

cal. 854

cal. 854B

automatic

1967/68-1969

18 ct. yellow gold on gold bracelet

silvered sunray

gilt sunray

anthracite

[black]

ø: 37 mm

h: 13.2 mm

water resistant to 6 atm

amagnetic to 80,000 A/m

base reference 866 A=1908

9120 AD

Ingenieur Automatic Calendar

cal. 8541

cal. 8541B

automatic

date

1967/68-1969

18 ct. yellow gold on gold bracelet

blue sunray

gilt sunray

silvered sunray

anthracite [black]

ø: 37 mm

h: 13.2 mm

amagnetic to 80,000 A/m

water resistant to 6 atm

base reference 866 AD=1808

9223

Ingenieur Automatic

cal. 375xx

automatic

date

ca. 1985-1988

(not listed)

18 ct. yellow gold on gold bracelet

black

...

ø: ca. 34 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on ETA cal. 2892-2

probably special edition for
Sultanate of Oman (crest on dial)

9224

Ingenieur Automatic

cal. 375 x

automatic

date

ca. 1985-1988

(not listed)

18 ct. yellow gold on gold bracelet
with diamonds on bezel

(also fitting cuffs links, ring and key fob)

black

...

ø: ca. 34 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on ETA cal. 2892-2

probably special edition for
Sultanate of Oman (crest on dial)

9225

Ingenieur SL Automatic

(AKA «Skinny Ingenieur»)

cal. 375

automatic

date

1983-1984

18 ct. yellow gold on gold bracelet

black

gilt

plated rhodium

white enamelled
(tritium & non-tritium)

ø: 34 mm

h: 8.8 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

movement based on
ETA cal. 2892

base reference 3505
succeeded by reference 9230

9230

Ingenieur SL Automatic

(AKA «Skinny Ingenieur»)

cal. 37521

automatic

date

1984-1986

18 ct. yellow gold on gold bracelet

black

gilt

plated rhodium

white enamelled
(tritium & non-tritium)

ø: 34 mm

h: 8.8 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

movement based on
ETA cal. 2892

base reference 3505
preceded by referenced 9225

9231

Ingenieur SL Automatic

(AKA «Skinny Ingenieur»)

cal. 37521

automatic

date

ca. 1985

18 ct. yellow gold on gold bracelet
with diamonds on bezel

gilt

...

ø: 34 mm

h: 8.8 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

movement based on
ETA cal. 2892

base reference 3505

9232

Ingenieur SL Automatic

(AKA "Jumbo" Ingenieur)

cal. 8541ES

automatic

date

1977-1979

18 ct. yellow gold on gold bracelet

black

gilt

...

ø: 38 x 40 mm

h: 12.5 mm

w: 285 g (??)

produced in 55 pieces

amagnetic to 80,000 A/m

water resistant to 6 atm

cushioned movement

9236

Ingenieur SL Automatic

(AKA «Skinny Ingenieur»)

(cal. 3752)

cal. 37531

automatic

date

ca. 1987-1989

18 ct. yellow gold on gold bracelet

gilt

...

ø: 34 mm

h: 8.8 mm

water resistant to 6 (catalogue 12) atm

amagnetic to 40,000 A/m

mvmt. based on ETA cal. 2892-A2

9238

Ingenieur 500,000 A/m

cal. 37590

automatic

date

1989-1992

18 ct. yellow gold on gold bracelet

black

white

gilt

ø: 34 mm

h: 8.8 mm

produced in ca. 137 pieces

water resistant to 6 atm
amagnetic to 500,000 A/m

movement based on ETA cal. 2892-A2

base reference 3508

9239

Ingenieur «Officially certified chronometer»

cal. 887

cal. 887/2

automatic

date

1993-1995

1995-2000/01

18 ct. yellow gold on gold bracelet

black

white

gilt

ø: 34 mm

h: 8.8 mm

water resistant to 6 atm

amagnetic to 80,000 A/m
cushioned movement
magnifying lens over date

movement based on JLC cal. 889

base reference 3521

9240

Ingenieur SL
Perpetual Calendar

cal. 3757

perpetual

1985-1986

18 ct. yellow gold on gold bracelet

white mat

[black]

ø: 34.5 mm

water resistant to 3 atm

amagnetic to 40,000 a/m

1st version of Da Vinci
perpetual module
movement based on ETA cal. 2892-A2

9241

Ingenieur SL
Perpetual Calendar

cal. 3757

perpetual

1987

18 ct. yellow gold on gold bracelet
with diamonds on bezel

white mat

[black]

ø: 34.5 mm

water resistant to 3 atm

amagnetic to 40,000 a/m

1st version of Da Vinci perpetual module
movement based on ETA cal. 2892-A2

same ref. no. used for Mark XII

9245

Ingenieur SL
Perpetual Calendar

cal. 37580

cal. 37582

perpetual

1987-1989

1989-1992

18 ct. yellow gold on gold bracelet

white mat

black

ø: 34.5 mm

water resistant to 3 atm

amagnetic to 40,000 a/m

1st or 2nd version of Da Vinci
perpetual module
movement based on ETA cal. 2892-A2

9258

Ingenieur 500,000 A/m

cal. 37590

automatic

date

1991-1993

18 ct. yellow gold on gold bracelet
with diamonds

black

white

gilt

ø: 34 mm

h: 8.8 mm

produced in 7 pieces

water resistant to 6 atm
amagnetic to 500,000 A/m
movement based on ETA cal. 2892-A2
54 diamonds (0.64 ct.)

base reference 3508

9259

Ingenieur «Officially certified chronometer»

cal. 887

cal. 887/2

automatic

date

1993?-2001?

18 ct. yellow gold on gold bracelet
with diamonds

gilt

....

ø: 34 mm

h: 8.8 mm

water resistant to 6 atm

amagnetic to 80,000 A/m
cushioned movement,
magnifying lens over date

movement based on JLC cal. 889

base reference 3521

9260

Ingenieur SL
Perpetual Calendar

cal. 37580

cal. 37582

perpetual

1987-1989

1989-1990

18 ct. yellow gold on gold bracelet
with diamonds on bezel and bracelet

white mat

[black]

ø: 34.5 mm

water resistant to 3 atm

amagnetic to 40,000 a/m

1st or 2nd version of Da Vinc
perpetual module
movement based on ETA cal. 2892-A2
base reference 9245

9263

Ingenieur SL
Perpetual Calendar

cal. 37580

cal. 37582

perpetual

1988-1989

1989-1991

18 ct. yellow gold on gold bracelet
with diamonds on bezel

white mat

[black]

ø: 34.5 mm

water resistant to 3 atm

amagnetic to 40,000 a/m

1st or 2nd version of Da Vinci
perpetual module
movement based on ETA cal. 2892-A2
base reference 9245

9386 A

Ingenieur Automatic

cal. 853

automatic

1959?-1963?

18 ct. yellow gold on gold bracelet

silvered

ø: 36.5 mm

h: 13.2 mm

water resistant to 10 atm

amagnetic to 80,000 A/m

(also in the sixties briefly called
ref. 993862?)

base reference 666 A

9386 AD

(= 993861)

Ingenieur Automatic Calendar

cal. 8531

automatic

date

1959?-1963?

18 ct. yellow gold on gold bracelet

silvered

ø: 36.5 mm

h: 13.2 mm

water resistant to 10 atm

amagnetic to 80,000 A/m

optional magnifying lens over date

in the sixties shortly called ref. 993861
base reference 666 AD

9503

Ingenieur SL Quartz

(AKA «Jumbo Ingenieur»)

cal. 2405

quartz

date

1976/77-1979

18 ct. yellow gold on gold bracelet

black
(millimetre-structure)

gilt

[plated rhodium-flash]

ø: 38 x 40 mm

h: 12.5 mm

produced in 45 pieces

water resistant to 6 atm
amagnetic to 40,000 A/m

cushioned movement

base reference 3003

9515

Ingenieur Chrono Alarm

cal. 633

meca-quartz

chronograph

date, alarm

1991-1996

18 ct. yellow gold on gold bracelet

black military

white

gilt

ø: 34 mm

h: 8.8 mm

water resistant to 3 atm
amagnetic to 4,800 A/m
movement based on JLC cal. 630

same watch on diamond bracelet
(ref. no. unknown)

base reference 3508

9517

Ingenieur Chrono Alarm

cal. 633

meca-quartz

chronograph

date, alarm

ca. 1991-1996

(not listed)

18 ct. (white ?) gold on gold bracelet with diamonds on bezel

black military

white

gilt

ø: 34 mm

h: 8.8 mm

water resistant to 3 atm
amagnetic to 4,800 A/m

movement based on JLC cal. 630

same watch on diamond bracelet
(ref. no. unknown)
base reference 3508

9533

Ingenieur Chronograph

cal. 631

chronograph

date

1988-1992/93

18 ct. yellow gold on gold bracelet

black (gilt subdials)

white

ø: 30 mm

water resistant to 3 atm

mvmt. based on JLC cal. 630

base reference 3734

9652

Ingenieur
in 18 ct. Yellow Gold

cal. 2250

quartz

date

1984-1986

18 ct. yellow gold on gold bracelet
with diamonds on bezel und bracelet

onyx

ø: ca 34 mm ?

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on ETA quartz ebauche

9701

Ingenieur SL Quartz

(AKA «Jumbo Ingenieur»)

cal. 2250

quartz

date

1980-1983/84

18 ct. yellow gold on gold bracelet

black

gilt

white - roman
('enamelled')

ø: 38 x 40 mm

h: 8.8 mm

produced in 56 pieces

amagnetic to 40,000 A/m
water resistant to 6 atm
cushioned movement

mvmt. based on ETA quartz ebauche
base reference 3303

9703

Ingenieur SL Quartz

(AKA «Skinny Ingenieur»)

cal. 2250

quartz

date

ca. 1982-1984

18 ct. yellow gold on gold bracelet

black

gilt

white - roman

ø: 34 mm

h: 8.8 mm

amagnetic to 40,000 A/m

water resistant to 6 atm

mvmt. based on ETA quartz ebauche

base reference 3305

9720

Ingenieur SL Quartz

(AKA «Jumbo Ingenieur»)

cal. 2250

quartz

date

ca. 1983

18 ct. yellow gold on gold bracelet
with diamonds

black

gilt

white - roman
('enamelled')

ø: 38 x 40 mm

h: 8.8 mm

produced in 4 pieces

amagnetic to 40,000 A/m
water resistant to 6 atm
cushioned movement
35 diamonds on bezel

mvmt. based on ETA quartz ebauche
base ref. 3303

9721

Ingenieur SL Quartz

(AKA «Skinny Ingenieur»)

cal. 2250

quartz

1981/82-1987

(sold out by
July 1985)

18 ct. yellow gold gold
on gold bracelet
with diamonds on bracelet, bezel & dial

gold (pavé)

ø: 34 mm

h: 8.8 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on ETA quartz ebauche

base reference 3305

9724

Ingenieur SL Quartz

(AKA «Skinny Ingenieur»)

cal. 2250

quartz

ca. 1982-1985?

18 ct. yellow gold gold
on gold bracelet
with diamonds on bezel

black

gilt

plated rhodium

white enamelled

ø: 34 mm

h: 8.8 mm

water resistant to 6 atm

amagnetic to 40,000 A/m

mvmt. based on ETA quartz ebauche

9727

Ingenieur
in 18 ct. Yellow Gold

cal. 2210

quartz

date

1985-1987

18 ct. yellow gold on gold bracelet

gilt

white

[black]

[plated rhodium]

ø: 32 mm

h: 6.1 mm ?

water resistant up to 3 atm

amagnetic to 20,000 A/m

mvmt. based on ESA calibre 255.411

9730

Ingenieur SL Quartz

(AKA «Skinny Ingenieur»)

cal. 2250

quartz

date

1980?-1985

18 ct. yellow gold on gold bracelet

gilt

[white]

[black]

[plated rhodium]

ø: 34 mm

h: 8.8 mm

amagnetic to 40,000 A/m

water resistant to 6 atm

mvmt. based on ETA quartz ebauche

base reference 3305

9737

Ingenieur
in 18 ct. Yellow Gold

cal. 2210

quartz

date

ca. 1986

(not listed)

18 ct. yellow gold on gold bracelet
with diamonds

[gilt]

[white]

[black]

[plated rhodium]

ø: 32 mm

h: 6.1 mm ?

water resistant up to 3 atm

amagnetic to 20,000 A/m

mvmt. based on ESA calibre 255.411

	List of Ingenieur models as produced by the International Watch Company, Schaffhausen	deutsche Version
first range	back to overview	last range

	4560	Ingenieur SL Quartz	cal. 2209 quartz date	?	?	?	ø: 25 mm	water resistant to 6 atm no reliable information available different type of bracelet than ref. 4550 ?
	9xxx?	Ingenieur in yellow gold	cal. 605 cal. 606x quartz date	ca. 1982/83	18 ct. yellow gold on gold bracelet	gilt [white] [black] [plated rhodium]	ø: ?	an Ingenieur with cal. 605/606 is only depicted in Jürgen King, Wristwatch movements from IWC, part VII, Watch, 2/02, p.55. Except for the dial inscription, it looks very similar to the contemporanean ref. 9730 May have never been actually issued

Unidentified or dubious models