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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

Zenith 18.28.1.P.E

Features
stem wind and set
sub second

Data
18''', Dm= 39.55mm
H= 5.2mm (5.4mm with winding wheels)
15 jewels
f = 18000 A/h
power reserve 36h

Balance staff U230

Stem W1764

Hands
1.55 x 0.95 / 0.25mm

Comments about the data

Remarks
1905-1982 (all types 18.28)
open face calibre
Breguet hairspring
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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft


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