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Fig. 1

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Fig. 2

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Fig. 3

Dugena 1057 (Förster 191)

sweep second
date: set by +/-24h

11.5''', Dm= 25.6mm, Do= 26.0mm
H= 6.6mm
F= 1.55mm
T= 2.35mm
25 jewels
f = 18000 A/h
power-reserve 38h

Balance staff U2034

Stem W2358

Mainspring / battery
1.45 x 9.0 x 0.10mm

1.50 x 0.90 x 0.22mm

Comments about the data

detached manual wind
On the predecessor with two date jumpers the date can be advanced by setting the hands back and forth between 20:30 and 24h. Here the hands must be set 24 hours to change the date. Hard to understand, since the single date jumper was easy to design for the quicker date setting.

1052: automatic
1053: automatic, date
budget version with rocker-bar winding:
1051: automatic
unimportant modifications:
1054: automatic
1055: automatic, date
1110: manual wind, 10.5'''
date simplified, set-lever spring new:
1057: automatic, date
1171: manual wind, date

Example, year: signature; shock device
ca. 1960: F, FB, 25 Jewels; Elastor-Förster
(Förster 191)

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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