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Fig. 4

Unitas 6310N

manual wind
sub second

13''', Dm= 29.0mm, Do= 29.4mm
H= 3.85mm
F= 0.8mm
T= 1.7mm
15/17 jewels
f = 18000 A/h
power reserve 47h

Balance staff U3458

Stem W1260 / W3037
thread 0.9 / 1.2mm

Mainspring / battery
Zf1404, 1.70 x 11.5 x 0.13 x 360mm

1.50 x 0.90 / 0.21mm

Comments about the data

so called Wehrmachtswerk (army movement)
differences unknown between 6310N, 6311N, 6312N, 6318N
likely just designations for varying bridge shapes (cf. Unitas 6317)

18000 A/h:
6310..6318: -
6410..6412, 6417: date
6415, 6416: day, date
suffix N: modified balance and stem mechanism
21600 A/h:
6325, 6326: -
6425, 6426: date
6428 : day, date
21600 A/h, redesign:
6376: -
6380: date
6388: day, date, no second

Example, year: signature; shock device
1-2) ca. 1960: UO, Swiss, 17 Jewels; Incabloc
3-4) ca. 1965: EJ, Swiss, 17 Jewels; Incabloc

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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