| [size=+1]Mido 00917P
Features
automatic
sweep second
Data
10.5''', Do= 24.5mm, H= 5.5mm
17 jewels
f = 18000 A/h
power reserve 40h
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Remarks
1954-1960
like 917P, but smaller pillar plate
exclusively for Mido with base plate of the AS 1131/1132
option: black rhodium plating (charcoal, slight mauve)
option: Fonto regulator with movable stud carrier and adjustustable regulator pin-width
option Incastar regulator:
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.
Example, year: signature; shock device
1956: Mido Limited, Swiss, 17 Jewels; Incabloc
(Mido 0917P, 11''', Incastar)
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