Slim Swiss platinum open faced lever dress watch Circa 1920

Platinum lever watch
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A slim Swiss platinum open faced lever dress watch, circa 1920. Keyless gilt bar movement with going barrel, plain cock with polished steel regulator, compensation balance with blue steel overcoil hairspring, club foot lever escapement, escape wheel pivots with endstones in a polished steel setting. Brushed platinum dial with subsidiary seconds, applied gold Arabic numerals and gilt hands. Plain case, clip on bezel and back, elongated triangular bow.
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Diameter: 42 mm
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Signed: No name