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View picture in original size
Fig. 1

View picture in original size
Fig. 2

IWC 66 19'''H6

stem wind and lever set
sub second

19''', Dm= 41.9mm, Do= 43.15mm
H= 6.0mm
(winding gear +0.2mm)
15 jewels
f = 18000 A/h
power reserve 30h

Balance staff U1447

Stem W1724

Mainspring / battery
2.05 x 0.20mm

Comments about the data

1909-1919, 7800
hunter calibre
bimetallic screw balance with 4 adjustment screws
Breguet hairspring
patented big bearings for crown- and ratchet wheel
barrel with Geneva stopwork
details cf. IWC 52 19'''H5

Swiss Patent 31457:
filed 05-11-1904, Fabrique d'Horlogerie de J. Rauschenbach (CH)
crown- and ratchet wheel with top- and bottom part, kept together with three screws each

Swiss Patent 55231:
filed 03-28-1911, Uhrenfabrik von J. Rauschenbach (CH)
dial fitting after push-button principle

Example, year: signature; shock device
1917: 659251, H6, +55231 - IWC Probus Scafusia, +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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft

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