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9''', Dm= 20.3mm
f = 18000 A/h
Balance staff Cyl 0.68 x 3.24 x 0.73mm
Mainspring / battery
Zf831, 1.30 x 7.0 x 0.08 x 220mm
1.20 x 0.70mm
Comments about the data
unusual: crown mechanism with rocker bar, but ratchet on back side
unknown whether the completely functionless crown wheel is standard
just minor differences between 278, 437
Example, year: signature; shock device
1936: - AS, Ebauches-SA logo from 1936 (TR in shield)
© M. Lorenz
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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