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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Durowe 421

manual wind
sub second

10.5''', Dm= 23.3mm, Do= 23.7mm
H= 4.5mm
F= 1.2mm
T= 2.2mm
15/17/21 jewels
f = 18000 A/h
power reserve 37h

Balance staff U1559

Stem W1296 / W2899
(thread 1.1 / 0.9mm)

Mainspring / battery
Zf1041, 1.40 x 9.0 x 0.11 x 260mm

1.40 x 0.65 / 0.20mm

Comments about the data

wheels beryllium bronze
to wide extent equal to Enicar 412, likely taken over from Enicar
differences not known between 420, 421

420, 421: 10.5''', manual wind, sub second
422: 10.5''', manual wind, sweep second
435: 10.5''', manual wind, sweep second, date
520: 11.5''', manual wind, sub second
522: 11.5''', manual wind, sweep second
552: 11.5''', automatic, sweep second

Example, year: signature; shock device
1950: K - Durowe 420
(Durowe 420)

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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