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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Favor B

Features
stem wind and set
sub second

Data
18.5''', Dm= 41.6mm, Do= 42.25mm
H= 5.3mm
F= 0.6mm
T= 2.35mm
15/17 jewels
f = 18000 A/h
power reserve 37h

Balance staff Ronda 4131

Mainspring / battery
Zf3554, 2.10 x 15.0 x 0.19 x 430mm

Hands
1.75 x 1.05 / 0.27mm

Comments about the data

Remarks
hunter calibre
bimetallic screw balance with 4 adjustment screws
Breguet hairspring

family:
10: open face
B: hunter
not all parts interchangable between both variants

Example, year: signature; shock device
ca. 1915: Drusus

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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