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View picture in original size
Fig. 1

Valjoux 23

Features
manual-wind chronograph, 60s, 30/45min, pillar wheel
sub second

Data
13''', Dm= 29.5mm, Do= 30.0mm
H= 5.82mm
F= 0.5mm
T= 1.6mm
17 jewels
f = 18000 A/h
power reserve 48h

Balance staff U1546

Stem W1276

Mainspring / battery
Zf889, 1.30 x 12.0 x 0.14 x 360mm

Hands
1.60 x 1.10 x 0.25 / 0.25 x 0.23mm

Comments about the data

Remarks
1916-1974, >125000 (VZ + 23)
since 1938 with two pushers
option: single pusher at 2h
early samples: Breguet hairspring
late samples: flat hairspring, mobile stud carrier, optional Triovis regulator

family/generations:
18000 A/h:
23 : base calibre
230: fly back
23C: calendar
72 : hour counter
720: hour counter, fly back
72C: hour counter, calendar
78 : no chronograph, calendar
88 : hour counter, calendar, moon phase
90 : no chronograph, calendar, moon phase
21600 A/h:
236: base calibre
234: date (window)
235: fly back
237: date (window), fly back
725: hour counter, fly back
726: hour counter
729: hour counter, 24h hand gear
730: hour counter, calendar

Example, year: signature; shock device
ca. 1950: Doxa S.A., Swiss, 17 Jewels (30min)

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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