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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

Felsa 107

manual wind
sub second

8.75''', Dm= 19.45mm, Do= 19.75mm
H= 3.3mm
F= 0.5mm
T= 1.6mm
15 jewels
f = 18000 A/h
power reserve 33h

Balance staff U36

Stem W137

Mainspring / battery
Zf662, 1.20 x 7.5 x 0.09 x 220mm

1.20 x 0.70 / 0.20mm

Comments about the data

bimetallic screw balance
different bridge shapes

Example, year: signature; shock device
1-2) ca. 1925: ZentRa 50A
(ZentRa 50A)
2-3) ca. 1925: Silena, 2 Adj, +Patent +No.102795, 15 Jewels - 184247, Pat'd; Silena
(Silena 8.75)

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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