Mido 917PC
Description
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| Incastar |
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The "Powerwind" caliber 917 debuted in 1954. Like all Mido movements, it
is not a true inhouse caliber, but an AS ebauche, exclusively produced for Mido.
The Cal. 917 used a rotor mechanism, which winds efficiently in both directions and
gives enough powers even when not worn very long.
The movement is a quite standard 17j movement with indirect center second hand and
date indicator without fast-setting mechanism.
To achieve best precision rates, Mido used the Incastar system, which allows a free
swinging hairspring without inprecise regulator pins. The effective length of the
hairspring is set with the knob, which clamps the hairspring between two
roles. Because of that, the beat synchronity has to be adjusted in a second step, too.
Since this is a bit time-consuming, the interesting Incastar mechanism was not used
in many consumer watches, but only in better watches.
Technical data
| Manufacturer | Mido |
| Caliber | 917PC |
| Number of jewels | 17 |
| Escapement | Anchor with pallets |
| Balance | Glucydur screw balance |
| Shock protection(s) | Incabloc |
| Balance cock direction | clockwise |
| Hairspring stud | moveable |
| Regulator type | Incastar |
| Features | SCI,QG,AUT |
| Functions | Hour, minute, second, day, selfwinding |
| Beats per hour | 18000 |
| Size | 12''' |
| Production time | 1954-196x |
| Image in Flume Werksucher | - |
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| Factsheet |
Usage gallery
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| Mido Multifort Superautomatic Powerwind |
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(11 Hits) (Information about the movement and details about the Incastar system)