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|Alpina 227 (Junghans J41a/1 *)|
stem wind and set
19''', Dm= 41.85mm, Do= 42.7mm
f = 18000 A/h
power reserve 35h
Balance staff U387
Mainspring / battery
Zf3032, 1.50 x 16.0 x 0.21 x 440mm
1.60 x 0.85 / 0.27mm
Comments about the data
open face calibre
*) Regarding the features, this calibre should have the Junghans designation J41a/1, but it is not yet known, whether it was also used in Junghans watches.
monometallic screw balance, staff pressed:
227: open face
bimetallic screw balance, staff riveted:
Example, year: signature; shock device
ca. 1935: 07831, Alpina 227 - 7831
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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