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stem wind and set
17''', Dm= 37.85mm
f = 18000 A/h
power reserve 31h
Balance staff U983
1.60 x 0.82 / 0.18mm
Comments about the data
open face calibre
bimetallic screw balance
options: Beguet hairspring, Reed's regulator
early two-section regulator for coarse and fine adjustment
17.89M: 17''', open face
18.89M: 18''', open face
18.90M: 18''', hunter
Example, year: signature; shock device
1922: 3803385, Longines W. Co Swiss, 5 Adj., 17 Jewels - 3803385, Longines, Wittnauer Longines
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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