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View picture in original size
Fig. 1

View picture in original size
Fig. 2

View picture in original size
Fig. 3

Dubois 20'''

stem wind and pin set
sub second

20''', Dm= 44.45mm, Do= 45.25mm
H= 7.2mm
(ratchet.wheel bridge +0.9mm)
F= 0.9mm
T= 3.4mm
15 jewels
f = 18000 A/h
power-reserve 35h

Mainspring / battery
2.40 x 17.0 x 0.20mm

1.64 x 0.62 / 0.30mm

Comments about the data

open face calibre
bimetallic screw balance
lever with counter weight and hidden pallets
ratchet-wheel bridge

Kathleen H. Pritchard assigns the signature Dubois et Cie. Genève of the watch to Philippe Dubois & Fils Le Locle, today DuBois & Fils. The silver hallmark from Le Locle (head office) is another indicator.

Example, year: signature; shock device
ca. 1880: - 32 5 38

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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