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View picture in original size
Fig. 1

Cyma 485.2

Features
automatic
sweep second
date: set by changing 20:45-24h

Data
12.5''', Dm= 28.0mm, Do= 28.5mm
H= 5.7mm
F= 1.9mm
T= 2.4mm
27 jewels
f = 18000 A/h
power reserve 42h

Balance staff U2624

Stem W2652

Mainspring / battery
1.40 x 10.5 x 0.11mm

Hands
1.30 x 0.85 x 0.22mm

Comments about the data

Remarks
1960- (R.485: 1953-)
excenter regulator for stud carrier
patented double-excenter winding with jewelled rollers (for low height)
jewel-bearing rotor
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).

family/generations:
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
1960: 386515, Cyma, R.485.2, Tavannes Switzerland, 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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft


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