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11.5''', Dm= 25.6mm, Do= 26.0mm
f = 18000 A/h
power reserve 39h
Balance staff U1699
Mainspring / battery
Zf1308, 1.60 x 8.5 x 0.10 x 250mm
1.30 x 0.90 x 0.20mm
Comments about the data
A wheel between barrel and minute pinion allows to place center-second wheel and barrel in the same layer, and thus, regarding former conditions, a rather thin movement, despite the sweep second. The changed revolution direction of the barrel makes an additional wheel in the winding gear necessary.
barrel and setting assembly modified to enable strongly bevelled base plate
1291: date hand
1349: day, date
1380: day, date hand, month
1510: for strongly domed dial
Example, year: signature; shock device
ca. 1950: Steelco, Swiss, 17 Jewels - AS 1291
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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