Old aircraft chronometer ACHS-1 USSR.

Description

The dial and hands are covered with a temporary mass flux;
The number of ruby stones - 25 pcs;
The operating voltage of the electric heater circuit is 27 ± 2.7 V;
The duration of one full spring plant is 3 days;
The ACHS-1 watch consists of 3 main mechanisms:
1) the mechanism of ordinary watches (for counting, the current time of day);
2) flight time mechanism (to indicate the time the aircraft was in transit);
3) stopwatch (for measuring and counting short periods of time).
Clock winding is carried out by rotating the left head counterclockwise to failure. Plant frequency once every 2 days.
Demonstration video of the aviation chronograph: https://youtu.be/aYRhhThMENg
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