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stem wind and set
18''', Dm= 39.7mm, Do= 40.55mm
f = 18000 A/h
Balance staff U1045
Mainspring / battery
Zf3495, 2.00 x 16.0 x 0.20 x 460mm
1.80 x 0.50 / 0.32mm
Comments about the data
open face calibre
unusual: crown mechanism with rocker bar, but ratchet on back side
crown wheel without function
attention: probably left handed ratchet-wheel screw
different bridge shapes in 579, 581
220, 283: long click spring
579, 581: click spring under ratchet wheel
Example, year: signature; shock device
1) 1939: old data sheet
2) ca. 1925: Swiss Made
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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