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View picture in original size
Fig. 1

View picture in original size
Fig. 2

FEF 303-1

Features
manual wind
sweep second

Data
10.5''', Dm= 23.3mm
15 jewels
f = 18000 A/h
power reserve 50h

Balance staff U819 / U3101
balance with/without screws

Stem W879

Mainspring / battery
Zf1211, 1.50 x 9.0 x 0.10 x 290mm

Hands
1.50 x 0.90mm

Comments about the data

Remarks
differences not known between 290-1...309-1, 330

family:
290: 10.5''', sub second
290-1, 330: 10.5''', sweep second
310: 11.5''', sub second
310-1, 340: 11.5''', sweep second

Example, year: signature; shock device
ca. 1945: Swiss Made, 15 Jewels; Incabloc
(FEF 310, 11.5''', sub second)

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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