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Fig. 1

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Fig. 2

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Fig. 3

Omega 28.10RA SC PC

automatic (bumper)
sweep second

Dm= 28.1mm, Do= 28.5mm
H= 5.35mm
F= 1.4mm
T= 1.5mm
17 jewels
f = 19800 A/h
power reserve 42h

Balance staff U1604

Stem W2907

Mainspring / battery
1.10 x 8.5 x 0.10mm

1.40 x 0.75 X 0.18mm

Comments about the data

family 28.10, 30.10 (330...355): 1943-1955, >1300000 (incl. >500000 chronometers)
1949 renamed 28.10RA SC PC to 350

30.1mm, sub second:
330 (30.10RA PC): -
331 (30.10RA PC AM): antimagnetic
332 (30.10T1 RA PC): redesign 331
333 (30.10T1 RA PC RG): excenter regulator
28.1mm, sub second:
340 (28.10RA PC): -
341: jubilee edition of 340
342 (28.10T1 RA PC): redesign 340
343 (28.10T1 RA PC RG): Chronometer, excenter regulator
344: redesign 342
28.1mm, sweep second:
350 (28.10RA SC PC): -
351 (28.10T1 RA SC PC): redesign 350
352: chronometer, excenter regulator
353: date
354: redesign 351
355: date, redesign 353

Example, year: signature; shock device
1946: 10753417, 28.10 R.A.SC.PC, Omega, Swiss, 17 Jewels; Incabloc

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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