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5.75 x 6.75''', Dm= 13.0 x 15.25mm
Do= 13.0 x 15.5mm
f = 19800 A/h
power reserve 43h
Balance staff U2256
Mainspring / battery
1.40 x 6.0 x 0.06mm
1.00 x 0.55mm
Comments about the data
13-20: 19800A/h, without mvt-mounting threads
13-21: 19800A/h, with mvt-mounting threads
Example, year: signature; shock device
ca. 1960: Certina, 13-20, Swiss, 17 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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