Small Swiss silver Helvetia coin pendant watch Circa 1970

Silver open faced lever
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A small Swiss silver Helvetia coin pendant watch, circa 1970. A solid, brushed case, graduated star bezel, reeded band, snap-on case back. Silver dial with painted black baton indexes and steel dauphine hands. A rhodium-plated movement, Geneva striping decoration, 17 jewels, straight-line lever escapement, free-sprung monometallic balance, self-compensating flat balance spring. Dial, case and movement signed.
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Thickness: 10 mm
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Diameter: 35 mm
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Signed: Sarcar  Genève