Swiss 18K yellow gold skeletonized dress watch Circa 1980

Gold skeletonized lever dress watch
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A very fine and very rare Swiss 18K yellow gold skeletonized keyless dress watch, circa 1980. The case is glazed on both sides, the case band and bezels are hand-engraved with scrolls, and the crown is set with a green cabochon stone and black feuille hands.
A gilt brass dial, skeletonized and hand-engraved movement, 18 jewels, straight-line lever escapement, monometallic balance, self-compensating Breguet balance spring, swan-neck micrometric regulator. Case and movement signed.
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Diameter: 47 mm
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Signed: Patek Philippe  Genéve
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Accompanied by the original  Patek Philippe box, Certificate of Origin.