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|Alpina 6521 (Unitas 33)|
stem wind and set
18.5''', Dm= 41.0mm, Do= 41.6mm
f = 18000 A/h
power reserve 33h
Balance staff U1659
Mainspring / battery
Zf3030, 1.50 x 16.0 x 0.19 x 490mm
2.00 x 1.15 / 0.26mm
Comments about the data
open face calibre
differences not known between hunter 277, 6521
273, 6525: open face, H= 5.3mm
273, 274: hunter, H= 5.3mm
277, 6521: open face, H= 4.15mm
277, 278: hunter, H= 4.15mm
suffix A: meaning not known
Example, year: signature; shock device
1933: Alpina 277A - 264630
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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