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Fig. 1

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Fig. 2

Dugena 3910 (Unitas 6425)

manual wind
sub second
date: set by changing 22-24h

13''', Dm= 29.0mm, Do= 29.4mm
H= 4.6mm
F= 1.55mm
T= 2.45mm
17 jewels
f = 21600 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 / 0.20mm

Comments about the data

so called Wehrmachtswerk (army movement)

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. 1970: EJ, Dugena 3910, 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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