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date: set by changing 20-24h
8.75''', Dm= 19.4mm, Do= 19.7mm
f = 18000 A/h
power reserve 41h
Balance staff U2279
Mainspring / battery
Zf928, 1.35 x 7.5 x 0.08 x 250mm
1.20 x 0.70 x 0.21mm
Comments about the data
differences not known between 64-2, 641-2
64, 641, 642: -
64-2, 641-2: date
suffix N: minor modifications date
Example, year: signature; shock device
ca. 1955: Swiss, 17 Jewels . FHF 64; Incabloc
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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