Watches/stopwatches produced by the Zlatoustovsky Watch Factory.
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Caliber: 3965, 16 jewels, hand-wound
Note: very simple stopwatch, bought at the flea market with box and document. Very noisy ticking, it's beautiful as collector item...i didn't yet used to measure the time of a run! :-) Precision to 0,2 seconds, 30 minutes counter. Acrylic glass, pressed caseback.