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View picture in original size
Fig. 1

View picture in original size
Fig. 2

IWC 63T 12'''

Features
stem wind and set
sub second

Data
12''', Dm= 26.5mm
H= 4.1mm
(winding gear +0.2mm)
15 jewels
f = 18000 A/h
power reserve 30h

Balance staff U871

Stem W897

Mainspring / battery
1.10 x 10.0 x 0.14 x 290mm

Hands
1.20 x 0.75 / 0.18mm

Comments about the data

Remarks
1918, 600
1892-1919, 30780 (all 63)
open face calibre
bimetallic screw balance with 4 adjustment screws
Breguet hairspring
two-part crown wheel
big bearings for crown- and ratchet wheel
barrel with Geneva stopwork
details cf. IWC 63 12'''
like 63-12''', but no set pin

Example, year: signature; shock device
1916: 638669 - IWC, +31457
(IWC 63 12''')

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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft


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