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View picture in original size
Fig. 1

Femga 520C

manual wind
sweep second

11.5''', Dm= 25.6mm, Do= 26.0mm
17 jewels
f = 18000 A/h
power reserve 35h

Balance staff U1312

Stem W1221

Mainspring / battery
Zf1313, 1.60 x 9.0 x 0.11 x 260mm

1.40 x 0.80 x 0.20mm

Comments about the data

There is too much likeness between the families Femga 500, 502, 520 and Precimax 250, 250SC, 400, 450, to believe in accident, but relations between the French Femga and the Swiss Precimax are not known. Further samples will probably resolve the doubts.

500: sub second
500C: sub second, date
500: indirect sweep second
520: direct sweep second
520C: direct sweep second, date

Example, year: signature; shock device
ca. 1945: F, 353, Helios Watch Co,, Swiss, 17 Jewels - Cal.450; Shock-Resist
(Precimax 450)

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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