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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

View picture in original size
Fig. 4

Longines 18.49

Features
stem wind and pin set
sub second

Data
18''', Dm= 39.75mm, Do= 40.65mm
H= 7.05mm
F= 0.75mm
T= 3.0mm
7/15 jewels
f = 18000 A/h
power reserve 38h

Balance staff U1048

Stem W1547

Mainspring / battery
2.50 x 15.5 x 0.19mm

Hands
1.78 x 0.55 / 0.26mm

Comments about the data

Remarks
1889-
open face calibre
bimetallic screw balance
ratchet on dial side, click-unlocking from rear side by marked screw head, crown mechanism with rocker bar
straight long lever (ligne angulaire) with counterweight and hidden pallets (Fig.3)

Swiss Patent 16831:
filed 11-21-1931, Charles Brisebard, Besancon (FR)
two-section regulator for coarse and fine adjustment (Fig.4)

family:
18.49: open face
18.50: hunter

Example, year: signature; shock device
1908: Longines, +16831 - 2030522

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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