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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Felsa 4123

Features
manual wind
option: sub second

Data
7.75''', Dm= 17.2mm, Do= 17.5mm
H= 2.85mm
F= 0.9mm
T= 1.35mm
17 jewels
f = 21600 A/h
power reserve 43h

Balance staff U2530 / U3123
balance with/without screws

Stem W2582

Mainspring / battery
Zf729, 1.25 x 6.5 x 0.07 x 210mm

Hands
1.20 x 0.60mm

Comments about the data

Remarks

family:
18000 / 21600 A/h respectively:
4020/4120: not bevelled
4021/4121: baseplate bevelled
4022/4122: baseplate and bridges bevelled
4023/4123: details not known
4024/4124: date, bridges plane
4025/4125: date, bridges bevelled
4027/4126: details not known
4028/4128: date, further details not known
-- /4130: balance, crown mechanism new

Example, year: signature; shock device
ca. 1960: IP, Milus 742, Swiss, 17 Jewels; Incabloc
(Felsa 4122)

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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