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stem wind and set
18.5''', Dm= 41.45mm, Do= 42.2mn
(new: dial collar +0.1mm)
f = 18000 A/h
power reserve 35h
Balance staff U408
Mainspring / battery
Zf3495, 2.00 x 16.0 x 0.20 x 460mm
1.82 x 1.15 / 0.21mm
Comments about the data
open face calibre
monometallic screw balance with press-fit staff
early samples like J8 with lever bridge, brass lever and escape wheel (Fig.1)
later lever cock and steel parts (Fig.3)
further detail modifications during production periode cf. photos
The balance with press-fit staff and with riveted staff (of the later J13...J17) are completely with hairspring interchangable.
Example, year: signature; shock device
1-2) ca. 1910: 0007548, Junghans
3-4) ca. 1920: 0291435, Junghans - 89 5
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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