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stem wind and set
17''', Dm= 38.35mm, Do= 39.0mm
f = 18000 A/h
power reserve 40h
Balance staff U977
1.90 x 1.25 / 0.20mm
Comments about the data
open face calibre
option: Breguet hairspring
260: separate escape-wheel cock, H= 4.2mm
261: center bearing in barrel bridge, H= 4.2mm
262: separate escape-wheel cock, H= 5.0mm
263: center bearing in barrel bridge, H= 5.0mm
Example, year: signature; shock device
1959: Certina 261, Swiss, 15 Jewels; 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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