Patek Philippe & Cie, Genève, No 724311, case No 313045, Ref. 2523/1. Produced in 1965, sold on October 17, 1974.Extremely fine and rare, "World Time", 18K yellow gold gentleman's wristwatch with two crowns, "guilloché" dial, luminescent skeleton hands, and an 18K yellow gold Patek Philippe bracelet "a mailles". Accompanied by a fitted box, the Extract from the Archives, and original certificate.\n\nC.three-body, solid, polished, lapidated lugs. D. matte silver, revolving ring dial bearing the names of 41 townsin the world, at the center, a "guilloché" silver medallion with applied yellow gold indexes, concentric revolving dial in 24 hours for the nocturnal and diurnal hours. The winding-crown on the 3 adjusts the hours and the24-hour ring; the winding-crown on the 9 turns the ring with the place names. Yellow gold "fancy" hands.M. 12'''-400 Geneva Quality Hallmark, rhodium-plated, "fausses côtes" decoration, 18 jewels, straight line lever escapement, monometallic balance adjusted for heat, cold, isochronism and 5 positions, shock-absorber, self-compensating Breguet balance-spring, micromettic regulator.Dial, case and movement signed.Diam. 36 mm.