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8.75''', Dm= 19.4mm, Do= 19.7mm
f = 18000 A/h
Balance staff U542
Mainspring / battery
Zf1299, 1.60 x 8.0 x 0.08 x 280mm
1.30 x 0.60mm
Comments about the data
differences not known between 250-253, 255, 260
250-253, 255, 260: sub second
250-1: sweep second
Example, year: signature; shock device
ca. 1965: Y3, Swiss, 17 Jewels; Incabloc
(FEF 250, sub second)
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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