Swiss gold watch set into 20 Dollar US coin dated 1900 Circa 1960

Gold coin watch
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A Swiss 18 carat yellow gold keyless lever watch set into a 20 Dollar U.S. coin dated 1900, circa 1960. Double coin case, coin opening with a concealed push piece in the band, three body hinged inner case. Gold movement ring, ring suspension loop. Matte gold dial with painted bâton indexes Arabic quarter hour numerals, outer minute divisions and blued steel bâton hands. Rhodium plated movement, 17 jewels, straight line lever escapement, cut bimetallic compensation balance, self compensating flat balance spring, index regulator. Case numbered.
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Diameter: 34 mm
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Signed: No Name
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Accompanied by a fitted box