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|Alpina 641 (Venus 60-I)|
8.75''', Dm= 19.4mm, Do= 19.7mm
f = 18000 A/h
power reserve 34h
Balance staff U42
Mainspring / battery
Zf570, 1.15 x 7.5 x 0.09 x 220mm
1.20 x 0.60 / 0.12mm
Comments about the data
different bridge shapes (cf. Fig.1, 3)
bimetallic screw balance, just optionally cut
641 (Venus 60-I): -
617, 669 (Venus 60-II): setting-lever spring improved
A list from Alpina claims the Venus 60-III as base for the Alpina 669, but until now no according sample was noticed.
Example, year: signature; shock device
1-2) ca. 1920: Alpina, 641 - U
3) ca. 1925: Alpina, 641
© V05 G00 B01 U00 U06 K01 A01 A10 A12 A14 L00 W03 D01 H00 F01
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.
|bidfun-db 21.3 © 02-08-15, mtr-Ranfft|
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