Patek Philippe. A Fine and Rare 18k Gold Automatic World Time Wristwatch with Cloisonné Enamel Dial, Bracelet, Certificate, and BoxSigned Patek Philippe, Genève, Ref. 5131/1, Movement No. 3'925'039, Case No. 4'459'728, Circa 2009Cal. 240 HU automatic movement, stamped with the Geneva Seal, 22k gold micro-rotor, 33 jewels, polychrome cloisonné enamel dial depicting the Americas, Europe, and Africa, 24 hours revolving chapter ring divided into diurnal and nocturnal hours, outer silvered ring with the names of 24 world cities, circular water-resistant-type case, time zone correction button in the band, sapphire crystal display screw back, 18k gold Patek Philippe link bracelet and deployant clasp, case, dial, and movement signed39.5mm diam.