Skeletonized Swiss gold, diamond and ruby-set dress watch Circa 1980

Gold, diamond and ruby-set keyless lever 
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A very fine, elegant and thin Swiss, 18K yellow gold, ruby and diamond-set, skeletonized, keyless dress watch, circa 1980. The case is set with diamonds and rubies, a petal-shaped bezel and bow set with 38 round white diamonds and 19 round rubies, glazed on both sides. Transparent dial, Blackened gold feuille hands. A gilt brass movement, skeletonized and hand-engraved, 20 jewels, straight-line lever escapement, monometallic balance, adjusted for heat, cold, isochronism and five positions, shock absorber, self-compensating flat balance spring. Case and movement signed.
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Diameter: 47 mm
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Signed: Audemars Piguet  Genève