Russian Ship's Chronometer

Russian Ship's Chronometer
marked First Moscow Watch Factory Kirova/USSR, around 1960, model M143, movement number 9566, heavy gimbal-mounted movement with fine chronometer escapement and cylindrical hairspring, plate with stripes decoration, silvered dial with indication of power reserve, power reserve, 56 hours, in original mahogany case and corresponding outer casing, working, with key, movement diameter 10.5 cm.