Swiss gold watch with jumping centre seconds Circa 1885

Gold open faced pocket watch from Patek Philippe
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An excellent, rare Swiss gentleman’s pocket watch with independent jumping centre seconds, circa 1880-1890. It features a gold plated manual winding movement with a lever escapement, a large compensation balance equipped with a Breguet hairspring, and simultaneous winding of both barrels. The watch has a white enamel dial with Roman numerals, a jumping second hand, and blued Breguet hands. The smooth 18 carat yellow gold case bears the Patek Philippe hallmark, featuring a lid engraved with the monogram NE, a glass dust cover, and a pusher and arresting slide on the edge to stop the second hand.
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Diameter: 56 mm.
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Weight: 166 g
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Signed: Patek Philippe
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In good condition with minimal wear, the dial shows a hairline crack. The movement and dial are unsigned.