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View picture in original size
Fig. 1

Dugena 3903 (Unitas 6310)

Features
manual wind
sub second

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

Balance staff U1540 / U3094
balance with/without screws

Stem W1260 / W3037
Gewinde 0.9 / 1.2mm

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

Hands
1.50 x 0.90 / 0.20mm

Comments about the data

Remarks
so called Wehrmachtswerk (army movement)
differences not known between 717, 3903

family/generations:
18000 A/h:
717, 3903: center-wheel bearing in barrel bridge
21600 A/h:
3909: center-wheel bearing in barrel bridge
3910: center-wheel bearing in barrel bridge, date
3914: center-wheel bearing in train bridge
The assignment of bridhe shapes meets current observations, but can also be accidental

Example, year: signature; shock device
ca. 1950: Swiss, 17 Jewels
(Unitas 6310)

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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