Swiss 18K yellow gold skeletonized keyless dress watch Circa 1983

Gold skeletonized lever pocket watch 
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A very fine and rare Swiss, 18K yellow gold, skeletonized, keyless dress watch, circa 1983. Sold on September 18, 1986. Accompanied by the Extract from the Archives. Engraved band and bezels, lancet bow, winding crown set with a cabochon sapphire, glazed back, sapphire crystals. Skeletonized dial, black feuille hands. Skeletonized movement, hand-engraved on both sides with scrolls, 18 jewels, straight-line lever escapement, monometallic balance, self-compensating Breguet balance spring, swan-neck micrometre regulator. Movement signed. Property of an Italian Gentleman.
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Diameter: 47 mm
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Signed: Patek Philippe  Genève