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View picture in original size
Fig. 1

View picture in original size
Fig. 2

IWC 854B

Features
automatic
sweep second
hack feature

Data
12.5''', Dm= 28.0mm
H= 4.85mm
23/25 jewels
f = 19800 A/h
power reserve 44h

Balance staff U3156

Stem W2269

Mainspring / battery
1.10 x 10.5 x 0.12mm

Hands
1.40 x 0.80mm

Comments about the data

Remarks
1969-1974, 43800 (854, 854B)
excenter winding mechanism, if 25 jewels with ruby-rollers
adjustment screws on balance spokes
Breguet hairspring
double excenter regulator for curb pins and stud carrier

Example, year: signature; shock device
1969: 1937208, International Watch Co Swiss; Incabloc
(23 jewels)

Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft


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