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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
bimetallic screw balance, staff riveted
J41: open face
J43: hunter, especially for Alpina 238
monometallic screw balance, staff pressed
J41a: open face
J43a: hunter, especially for Alpina 228
suffix /1: separate escape-wheel cock
Example, year: signature; shock device
ca. 1935: 12875, Junghans 41a - 2845
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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