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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

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Fig. 5

Harwood (AS)

automatic (bumper)
no manual wind

11.5''', Dm= 24.7mm (with bumper Do= 25.6mm)
H= 5.35mm
15 jewels
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
selfwinding mechanism
filed 1920
Swiss Patent 106583:
filed 10-16-1923, John Harwood, Baldrine-Lonon (Ile of Man, GB) und Harry Cutts, New Brighton (Cheshire, GB)
selfwinding mechanism

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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft

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