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Fig. 1

View picture in original size
Fig. 2

Cyma 424K

manual wind
sub second

8.75''', Dm= 19.4mm, Do= 19.7mm
H= 3.5mm
15/17 jewels
f = 18000 A/h
power reserve 45h

Balance staff U1656

Stem W1263

Mainspring / battery
Zf928, 1.35 x 7.5 x 0.08 x 250mm

1.05 x 0.70 / 0.15mm

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

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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