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stem wind and pin set
18''', Dm= 40.3mm, Do= 40.9mm
(winding gear +0.1mm)
f = 18000 A/h
1.90 x 0.56 / 0.28mm
Comments about the data
open face calibre
bimetallic screw balance with 2 adjustment screws
The signatures on the back of the movement (Fig.3) and in the case (Fig.4) assign the watch to Cortébert. But the later was also used by Dubois, and according to the signature under the dial (Fig.2), the movement came from Dubois. Other reasons for this combination of signatures are unlikely, but not impossible. Therefore this calibre is here also listed as Cortebert 18'''.
Example, year: signature; shock device
ca. 1905: 78918, JFC (Juillard Frères, Cortébert SA) - DuBois & Cie, Le Locle
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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