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stem wind and set
19''', Dm= 42.9mm
(dial collar +0.1mm)
f = 18000 A/h
power reserve 35h
Balance staff U409
Mainspring / battery
Zf3495, 2.00 x 16.0 x 0.20 x 460mm
1.85 x 1.19 / 0.20mm
Comments about the data
open face calibre
bimetallic screw balance with riveted staff
brass lever and escape wheel
The balance with press-fit staff (even from the earlier J9) and with riveted staff are completely with hairspring interchangable.
J13: open face, 19'''
J14: open face, for Alpina with separate escape-wheel cock
J15: hunter, 19'''
J16: open face, 18.5'''
J17: hunter, 18.5'''
Example, year: signature; shock device
ca. 1920: 0369261 - 92
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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