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8.75''', Dm= 19.4mm, Do= 19.8mm
f = 18000 A/h
Balance staff U49
Mainspring / battery
Zf650, 1.20 x 7.0 x 0.08 x 220mm
1.10 x 0.65mm
Comments about the data
bimetallic screw balance
differences not known between 361-367, 500, 501, 505-509
Example, year: signature; shock device
ca. 1925: Swiss Made - 2, PA (Piara)
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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