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View picture in original size
Fig. 1

View picture in original size
Fig. 2

UMF 33-50

Features
manual wind

Data
8.75''', Dm= 20.0mm, Do= 20.4mm
H= 3.7mm
F= 0.3mm
T= 1.9mm
7 jewels
f = 18000 A/h
power reserve 44h

Balance staff U2587

Stem W2556

Mainspring / battery
Zf651, 1.20 x 7.5 x 0.08 x 250mm

Hands
1.23 x 0.79mm

Comments about the data

Remarks
1960-1971 (39-50, 33, 33-50)
ratchet on dial side, crown mechanism with rocker bar
the calibre designation was mutilpy changed (see below)

family/generations:
Diva, 3 (M3): 15 jewels
modified bridge layout:
39-10: 15 jewels
39-12: 15/16 jewels, sweep second
39-20, 32-10: 17 jewels
39-22, 32-12: 17 jewels, sweep second
39-40, 33: 5 jewels, pin lever
39-50, 33, 33-50: 7 jewels
39-80: 15 jewels, no shock protection

Example, year: signature; shock device
ca. 1960: UMF 33
(UMF 33)

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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