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date: set by changing 21:20-24h
7.75''', Dm= 17.2mm, Do= 17.5mm
f = 21600 A/h
power reserve 42h
Balance staff U3220
Mainspring / battery
1.30 x 7.0 x 0.08mm
1.20 x 0.70 x 0.20mm
Comments about the data
2540, 2544: manual wind
2541, 2545: manual wind, date
2551: automatic, date
suffix R: ball-bearing rotor (not in signature)
Example, year: signature; shock device
1-3) ca. 1965: Zodiac Ltd, 46-47, Swiss, 17 Jewels - Patented; Incabloc
(Zodiac 47, ETA 2551R)
4) ca. 1970: Swiss; Incabloc
(standard rotor shape)
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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