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View picture in original size
Fig. 1

View picture in original size
Fig. 2

OC 120 (CO 120, Rego 153)

simple manual-wind chronograph, 60s
only start/stop second, no reset feature
sweep second
two senseless counters moved by the hour wheel

12''', Dm= 27.0mm, Do= 27.8mm
H= 4.6mm
(winding gear +0.35mm)
(counter wheels +0.3mm)
F= 0.6mm
T= 2.4mm
0 jewels
f = 18000 A/h
power-reserve 35h

Balance staff U2199

Stem W2113

Mainspring / battery
Zf1400/1, 1.70 x 11.0 x 0.11 x 390mm

1.80 x 1.10 x 0.20 / 0.65 x 0.65mm

Comments about the data

pin-lever escapement
indirect minute, hand friction clutch on barrel (Roskopf type)
noz known as Rego calibre
likely variant of the Rego 153 with senseless counters for fake chronographs, branded as Ling on the dial, and OC Cal 120 on the back

Example, year: signature; shock device
ca. 1965: Co (o in C) 120

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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