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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Durowe 425/1

manual wind
sweep second

10.5''', Dm= 23.3mm, Do= 23.75mm
H= 4.15mm
F= 1.0mm
T= 2.1mm
17/21 jewels
f = 18000 A/h
power reserve 33h

Balance staff U2130

Stem W2471

Mainspring / battery
Zf683, 1.20 x 9.5 x 0.11 x 290mm

1.30 x 0.80 x 0.22mm

Comments about the data

wheels beryllium bronze
The low quantity of movements from this family, compared with the pedecessors and succesors, indicate that they were produced hardly longer than one year. Dispite this two variants of the manual wind gear and two balances were produced in parallel, and one may believe that all was just an experiment.

425: 10.5''', manual wind
430: 10.5''', manual wind, gear like automatic
562: 11.5''', automatic
565: 11.5''', automatic, date
suffix /1: shorter balance staff

Example, year: signature; shock device
ca. 1955: 20, Laco, 17 Jewels - 4; Duro-Swing
(Durowe 430)

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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