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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Omega 18'''

stem wind and set
sub second

18''', Dm= 40.0mm, Do= 40.7mm
H= 6.65mm
(winding gear +0.3mm)
F= 0.5mm
T= 2.4mm
7/15/16 jewels
f = 18000 A/h
power reserve 34h

Balance staff U320

Stem W248

Mainspring / battery
2.55 x 15.0 x 0.18mm

1.90 x 1.25 / 0.30mm

Comments about the data

open face calibre
bimetallic screw balance with 4 adjustment screws
Breguet hairspring
stem setting mechanism with clutch wheel and rocker bar, prevents moving of hands when switching to winding position,

Example, year: signature; shock device
1911: 3935408, Omega - 3935409, Omega Swiss
Surly the barrel bridge with the by 1 lower number was mounted during production. Under the balance cock the trailing digits 5409 are found; so it belongs to the base plate.

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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