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stem wind and set
Dm= 39.2mm, Do= 39.8mm
(winding gear +0.3mm)
f = 18000 A/h
power reserve 33h
Balance staff U971
Mainspring / battery
Zf1262, 1.50 x 13.5 x 0.17 x 390mm
1.85 x 1.10 / 0.25mm
Comments about the data
open face calibre
except varying bridge layouts no differences known between 516, 518, 522
516, 518, 522: open face
517, 519, 523: hunter
suffix A: bimetallic screw balance, Reed's regulator
suffix B: details not known
Example, year: signature; shock device
ca. 1930: - 641002
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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