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10.5 / 11.5''', Dm= 23.3 / 25.6mm
Do= 23.7 / 26.0mm
f = 18000 A/h
power reserve 35h
Balance staff U1312
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, 11.5''')
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.
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