The Ingenieur in Titanium and 18 ct. Yellow Gold

Specifications:

quartz calibre 2209 with date display
- ETA production
- diameter: 18.20 mm = 8 3/4 lignes
- height of movement: 2.10 mm on battery, 1.95 on movement
- number of jewels: 9
- frequency: 32,768 Hz
- fine adjustment: inhibition
- total production: n/a
tripartite screwed case
- top part with bezel: flat surface with 5 recesses (for screwing tools) in stochastical position
- without amagnetic soft iron cage
- glass: sapphire
without Ingenieur-logo or any other Ingenieur typical scripture above index at 6 o'clock
straps & bracelets
- leather strap with pushbutton safety clasp
- titanium- and mixte-bracelets of type «Porsche Design»
- gold bracelet of type «Ingenieur perpetual» (1985-1987)

reference	Name	movement	listed	case bracelet/strap	dials	measurements	remarks
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
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

picture

(click on thumbnail
for enlarged version)

reference

Name

movement

listed

case

bracelet/strap

dials

measurements

remarks

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

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

Specifications:

quarz calibre 2250 with date display
- produced by ETA (ESA calibre 255.411)
- diameter: 25.60 mm (other information: 23.30 mm)
- height of movement: 2.5 mm
- number of jewels: 7
- frequency: 32,768 Hz
- fine adjustment: inhibition
- total production: 19,200 pieces (only part of which was used on Ingenieur models)
tripartite screwed case
- top part with bezel: flat surface with 5 recesses (for screwing tools) in stochastical position
- amagnetic to 20,000 A/m, movement protected by Farraday's cage made of soft iron inner case and soft iron dial bottom
- Glass: sapphire
Ingenieur-logo above index at 6 o'clock
straps & bracelets
- leather strap with pushbutton safety clasp
- titanium- and mixte-bracelets of type «Porsche Design»: version 1 (1985-1986), version 2 (1987-1989)
- gold bracelet of type «Ingenieur perpetual» (1985-1987)

reference	name	movement	listed	case bracelet/strap	dials	measurements	remarks
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
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
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

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

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

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

reference	name	movement	listed	case bracelet/strap	dials	measurements	remarks
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
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 movement 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 movement based on ETA cal. 2892-2 probably special edition for Sultanate of Oman (crest on dial)
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

picture

(click on thumbnail
for enlarged version)

reference

name

movement

listed

case

bracelet/strap

dials

measurements

remarks

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

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

movement 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

movement based on ETA cal. 2892-2

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

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

	1985-1989: The «Ingenieur in Titanium and 18 ct. Yellow Gold» with quartz movement (cal. 2209, 2210, 2249, 2250, 618)	deutsche Version
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The «Ingenieur in Titanium and 18 ct. Yellow Gold» for Ladies (1983/84-1989)

The «Ingenieur in Titanium and 18 ct. Yellow Gold» for men (1984/85-1989)

Jewellery watches und other special editions (1986/87-1989)