The Ingenieur "Offically Certified Chronometer"

Specifications:

automatic calibre 887x with ball bearing platinum rotor and date display
- based on Jaeger-Le Coultre production
  - calibre 887 = JLC calibre 889
  - Kaliber 8872 = JLC calibre 889/2
- diameter: 26 mm
- height of movement: 3.25 mm
- number of jewels
  - calibre 887: 34
  - calibre 887/2: 36
- frequenzy: 28,800 A/h = 4 Hz
- balance spring: flach
- fine adjustment: Spirofin
- shock protection: Kif
- surface: gilt, oscillation weight made of platinum
- total production: n/a
tripartite, screwed case
- steel and mixte cases: waterresistant to 12 atm
- gold cases: waterresistant to 6 atm
- top part with bezel: flat surface with 5 recesses (for screwing tools) in stochastical position
- amagnetic to 40,000 A/m, movement protected by Farraday's cage made of soft iron inner case and soft iron dial bottom
- glass: sapphire
case number on case back at the edge of the inner circle
chronometer certificate
Ingenieur-logo with scripture OFFICIALLY CERTIFIED | CHRONOMETER | AUTOMATIC above index at 6 o'clock
straps & bracelets (bracelets of type «Ingenieur SL» II with raised interlinks)
- croco/leather
- stainless steel
- 18 ct. yellow gold

reference	name	movement	listed	case bracelet/strap	dials	measurements	remarks
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
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
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

picture

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reference

name

movement

listed

case

bracelet/strap

dials

measurements

remarks

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

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

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

	1993-2001: The Ingenieur «Officially Certified Chronometer» The ref. 3521 and her relatives with automatic movement (cal. 887 by JLC)	deutsche Version
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