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day: set by pusher at 8:30h
date: set by pusher at 9:30h
12''', Dm= 26.6mm, Do= 27.1mm
(dial spacer +0.1mm)
f = 18000 A/h
Balance staff U1709
Mainspring / battery
Zf1397, 1.70 x 10.5 x 0.10 x 385mm
1.50 x 0.80 x 0.21mm
Comments about the data
The only large-scale produced regulator featuring a free oscillating hairspring. The end of the spring is fixed between two rollers, adjusting actually its length (photos at the bottom). No isochronism error by the gap between the regulator pins.
252: chronograph, calendar
253: date hand
254: day, date hand, moon phase
255: day, date
256: day, date, moon phase
Example, year: signature; shock device
ca. 1955: Angelus Watch Co, Swiss Patent +, 16 Jewels, Incabloc
(drivers for day, date, second missing)
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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