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stem wind and pin set
19''', Dm= 42.2mm, Do= 42.9mm
(ratchet bridge +0.8mm)
f = 18000 A/h
power reserve 25h
Mainspring / battery
2.60 x 16.5 x 0.20
1.90 x 0.55 / 0.30mm
Comments about the data
bimetallic screw balance (not cut)
ratchet on back side, crown mechanism with rocker bar
straight long lever (ligne angulaire) with counterweight and hidden pallets
The similarity to early Longines movements (e.g. Longines 18.50) can't be denied, but a relation between Latitude and Longines is not known.
I've seen an open-face variant of this calibre with the signature Longitude. After trademark registers and after the case signature this could be assigned to Ernest Degoumois, St.-Imier (CH). So this company was likely also responsible for the calibre shown here, and due to the narrow vincinity to Longines certain contacts can't be denied.
Example, year: signature; shock device
ca. 1890: Latitude - 262
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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