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|Dugena 1028 (Helvetia 861, ETA 2522R)|
date: set by changing 20:40-24h
11.5''', Dm= 25.6mm, Do= 26.0mm
f = 18000 A/h
power reserve 48h
Balance staff U3339
Mainspring / battery
1.20 x 11.0 x 0.125mm
1.50 x 0.90 x 0.21mm
Comments about the data
escapement, barrel, and ball bearing from Helvetia
999 : manual wind
1028: automatic, date
1029: auto, date quickset
1069: manual wind, date
Example, year: signature; shock device
ca. 1970: Helvetia, Swiss Made, 25 Jewels - 4080, Patented; Incabloc
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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