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|IWC 63 12'''|
stem wind and pin set
12''', Dm= 26.5mm
(winding gear +0.2mm)
f = 18000 A/h
power reserve 30h
Balance staff U871
Mainspring / battery
1.10 x 10.0 x 0.14 x 290mm
1.20 x 0.75 / 0.18mm
Comments about the data
1892-1919, 30780 (all 63)
open face calibre
bimetallic screw balance with 4 adjustment screws
two-part crown wheel
big bearings for crown- and ratchet wheel (Fig.3)
barrel with Geneva stopwork (Fig.4)
Example, year: signature; shock device
1916: 638669 - IWC, +31457
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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