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View picture in original size
Fig. 1

View picture in original size
Fig. 2

IWC 53 18'''H5

stem wind and lever set
sub second

18''', Dm= 40.5mm, Do= 40.9mm
H= 5.2mm
(winding gear +0.2mm)
F= 0.9mm
T= 1.8mm
15/16 jewels
f = 18000 A/h
power reserve 30h

Balance staff U1119

Stem W1618

Mainspring / battery
1.85 x 17.0 x 0.21 x 540mm

1.90 x 1.00 / 0.26mm

Comments about the data

1906-1908, 1500
1889-1927, ~176820 (all 53)
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

Example, year: signature; shock device
1910: 487998, +31457, IWC Probus Scafusia - IWC Probus Scafusia
(IWC 53 19'''H6, 16 jewels)

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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