Patek Philippe & Cie, Genève, Calatrava,No. 739730, case No. 309788, Ref. 2597 HS (Heure sautante), circa 1962.Very fine and rare two time zone, 18K pink gold gentleman's wristwatch with three hands.

C. three body, massive and brushed, flat bezel, concave lugs, bearing two buttons and an independently adjustable blued steel second hour-hand display (patented in 1959) to indicate the time in two different time zones, by steps of one hour at a time. D. matte silver with applied pink gold indexes, auxiliary seconds dial. "Dauphine" pink gold hands. M. Cal. 12'''-400 HS, punched with the Poinçons de Genève, rhodium plated, "fausses côtes" decoration,18 jewels, lever escapement, Giromax balance adjusted to heat, cold isochronism and5 positions, shock-absorber, self-compensating Breguet balance spring, micrometer regulator.Dial, case and movement signed.Diam. 35 mm.