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date: set by changing 21:30-24h
10.5''', Dm= 23.3mm
f = 18000 A/h
power reserve 45h
Balance staff U3110
Mainspring / battery
1.50 x 10.0 x 0.12mm
1.50 x 0.70mm
Comments about the data
8370: no second
8374: no second, date
8376: no second, day, date
8381: sweep second
8385: sweep second, date
8387: sweep second, day, date
8371: sub second, option: chronograph
8391: sweep second
8395: sweep second, date
8397: sweep second, day, date
8399: sweep second, skeletonized
extensions -66, -67 designate minor modifications and their year of introduction
Not all variants were actually made. Only those are listed, which are actually known or contained in current registers.
Example, year: signature; shock device
ca. 1970: E3, E.K.O. Manufacturing Co., Swiss, 17 Jewels; Kif-Protechoc
(EB 8397-67, 11.5''')
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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