Swiss 60-second split-seconds chronograph stopwatch Circa 1969

Chromed keyless lever stopwatch by Nero Lemania
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A fine and unusual Swiss chromed keyless lever stopwatch with 60-second split-seconds chronograph and instantaneous 30-minute register, circa 1969. Rhodium-plated movement, 11 jewels, straight-line lever escapement, monometallic balance, self-compensating blued steel Breguet balance spring, index regulator. Nickel cuvette. White enamel dial with outer 1/5th seconds track and black five-seconds Arabic markers, subsidiary seconds and 30-minute register, original blued steel hands, red split-seconds hand. Polished case, the back engraved with military designation 0552/521-6482, start/stop activation via crown with plastic capped split-second button on the band. Dial signed, movement signed and numbered.
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Diameter: 51 mm
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Thickness: 18 mm
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Signed: Nero Lemania Swiss made