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no manual wind
11.5''', Dm= 24.7mm (with bumper Do= 25.6mm)
f = 18000 A/h
1.18 x 0.65mm
Comments about the data
1925-1931, A. Schild, Fortis
1926-1931, A. Schild, Blancpain ca. 14000
first serial-production automatic
bimetallic screw balance
set by revolving bezel
bumper bearings on dial. and back side
winding torque limited by friction coupled bumper
Britsh Patent 1576120
Swiss Patent 106583:
filed 10-16-1923, John Harwood, Baldrine-Lonon (Ile of Man, GB) und Harry Cutts, New Brighton (Cheshire, GB)
Example, year: signature; shock device
1-3) ca. 1925: SF, Harwood Selfwinding Watch Co Inc, Patent No. 1576120, 2 Adjts, 15 Jewels - 697
4-5) 1926: Harwood Selfwinding Watch Co Ltd, Swiss, Patent No. 106583, 2 Adj., 15 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.
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