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stem wind and set
18''', Dm= 39.55mm
H= 5.2mm (5.4mm with winding wheels)
f = 18000 A/h
power reserve 36h
Balance staff U230
1.55 x 0.95 / 0.25mm
Comments about the data
1905-1982 (all types 18.28)
open face calibre
option: bimetallic screw balance (Fig.3)
Example, year: signature; shock device
1-2) ca. 1930: 69145, Zenith - 145
3-4) ca. 1935: 85506, Zenith - 506
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.
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