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13''', Dm= 29.3mm
f = 18000 A/h
power reserve 40h
Balance staff U1837
1.84 x 1.09mm
Comments about the data
Kif shock protection
winding by strokes of the rotor onto a simple device, which transmits the energy directly to the mainspring
patented in 1951, introduced 1953
Swiss Patent 278649:
automatic impulse winding
filed 05-18-1951, Bohdan Cervinka, Lausanne (CH) and Dr. Vladimir Cervinka, Halifax (CA)
Example, year: signature; shock device
1953: Brevet +278649, Bovimatic, Helsa Watch Factory, Swiss, 17 Jewels; Kif Protechoc
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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