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date: set by changing 20:45-24h
12.5''', Dm= 28.0mm, Do= 28.5mm
f = 18000 A/h
power reserve 42h
Balance staff U2624
Mainspring / battery
1.40 x 10.5 x 0.11mm
1.30 x 0.85 x 0.22mm
Comments about the data
1955-1960 (R.485: 1953-)
excenter regulator for stud carrier
patented double-excenter winding with jewelled rollers (for low height)
An intermediate wheel between minute pinion and the rest of the train allows big balance and low profile without reducing the sturdiness (cf. Cyma 10 Pleiade).
Moreover this layout allows to place the seconds wheel either in the center or for a sub second, without further modifications (details cf. Cyma 488.2).
late samples with excenter regulator for stud carrier (Fig.4, 5)
480: automatic, sweep second
481: automatic, sub second
482: automatic, sub second, date
484: manual wind, sub second
485: automatic, sweep second, date
486: manual wind, sweep second
487: manual wind, sub second, date
488: manual wind, sweep second, date
suffix .1: automatic with new rotor lock
suffix .2: excenter regulator for stud carrier
Example, year: signature; shock device
1-3) 1956: 218905, Cyma, R.485.1, Tavannes Switzerland, Patended, 27 Jewels; Cymaflex-I
4-5) 1958: 283070, Cyma, R.485.1, Tavannes Switzerland, Patended, 27 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.
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