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11.5''', Dm= 25.6mm
f = 18000 A/h
power reserve 42h
Balance staff U2420
Mainspring / battery
1.10 x 9.0 x 0.10mm
1.30 x 0.70mm
Comments about the data
later samples with varying combined setting for escapement wheel, and/or mobile stud carrier (cf. Aurore-Villeret )
differences not known between 4200-4202, 4205-4207, probably designations for varying bridge shapes (cf. Aurore-Villeret 423)
4200-4202, 4205-4207: 11.5'''
Example, year: signature; shock device
ca. 1960: 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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