Ceas Longines 18.90M, functional, stare foarte buna, onginal, 18.90M

Features
stem wind and set
sub second

Data
18''', Dm= 39.0mm
H= 3.8mm
15/17 jewels
f = 18000 A/h
power reserve 32h

Balance staff U983

Stem W1482

Hands
1.58 x 0.71 / 0.25mm

Remarks
1914-
open face calibre
bimetallic screw balance
options: Beguet hairspring, Reed's regulator
early two-section regulator for coarse and fine adjustment

family:
17.89M: 17''', open face
18.89M: 18''', open face
18.90M: 18''', hunter

Example, year: signature; shock device
1922: 3918087, Longines - 3918087, Longines
(Longines 18.89M, open face)
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.