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8.75''', Dm= 19.4mm, Do= 19.7mm
f = 18000 A/h
power reserve 45h
Balance staff U1656
Mainspring / battery
Zf928, 1.35 x 7.5 x 0.08 x 250mm
1.20 x 0.75 x 0.25mm
Comments about the data
420: automatic, sub second
420KT: automatic, sweep second
424K: manual wind, sub second
425: automatic, sweep second, date
426KT: manual wind, sweep second
shock device only in calibres with suffix K
Example, year: signature; shock device
ca. 1950: 337639, R.424, Cyma, Swiss, Tavannes Switzerland, 17 Jewels; Cymaflex-I
(Cyma 424K, 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.
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