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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

Durowe 881

electromechanically controlled balance motor
back crown
jumping sweep second
date: set by changing 22:30-24h
electrical and mechanical hack feature

13.5''', Dm= Do= 30.55mm
H= 5.5mm
(balance bearing +0.3mm, battery +1.5mm)
7 jewels
f = 21600 A/h

Mainspring / battery

1.30 x 0.60 x 0.19mm

Comments about the data

Movements of this kind are not self-starting. So when pulling the crown, the balance is locked in a position, from which it reliably starts when pushing the crown (Fig.3).
am/pm display by dot below/above date numeral (Fig.4)
Attention: With once setting the hands back and forth, the date is only advanced half a day. So the date can be set at noon and midnight, but care must be taken that the dot is finally in the correct position (cf. above).

870: electromechanical
880: electromechanical, date
modifications base plate, balance bridge
871: electromechanical
881: electromechanical, date
882: electronical, date

Example, year: signature; shock device
1969: Timex, 881, W. Germany, 7 Jewels; Duro-Swing

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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