Special Ingenieur Editions or Unidentified Models
 deutsche Version
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 reference name
movement
 listed case

bracelet/strap
dials
measurements
remarks
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)
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 18 ct. 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

 

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