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|Dugena 1027 (Helvetia 847, AS 1740)|
date: set by changing 20-24h
11.5''', Dm= 25.6mm, Do= 26.0mm
(ball bearing +0.05mm)
f = 18000 A/h
power reserve 36h
Balance staff U2981
Mainspring / battery
1.20 x 9.0 x 0.10mm
1.50 x 0.90 x 0.20mm
Comments about the data
rotor placed out of center
The winding gear is integrated in the movement, instead of attaching it to a manual-wind calibre as usual. This led to a sensationally thin movement at that time.
detached manual wind
escapement from Helvetia
Kif-Duofix combined settings for escape wheel
Example, year: signature; shock device
ca. 1965: Helvetia, Swiss Made, 25 Jewels; Incabloc
(Helvetia 846, AS 1739)
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.
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