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Fig. 3

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Fig. 4

Longines 431

Features
automatic
sweep second
date: set by changing 22:30-24h

Data
11.5''', Dm= 25.6mm, Do= 26mm
H= 4.9mm
(ball bearing +0.1mm)
F= 1.7mm
T= 2.0mm
17/25 jewels
f = 36000 A/h
power reserve 40h

Balance staff U3308

Stem W3253

Mainspring / battery
1.00 x 10.0 x 0.13mm

Hands
1.50 x 0.90 x 0.21mm

Comments about the data

Remarks
1967-

family/generations:
36000 A/h, excenter regulator:
430: sweep second
431: sweep second, date
432: no second
433: no second, date
28800 A/h, micrometer regulator:
6641: sweep second, 25 jewels
6642: sweep second, 17 jewels
6651: sweep second, date, 25 jewels
6652: sweep second, date, 17 jewels

Example, year: signature; shock device
1-3) 1970: 50190196, Longines, Longines Watch Co, Swiss, 17 Jewels; Kif-Ultraflex
4) 1970: 50371798, Longines, Longines Watch Co, Swiss, 36'000, Adjusted 4 Positions and Temperature, 25 Jewels; Kif-Ultraflex

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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