Case material: Yellow gold; Charge: Automatic; Conditions: Used Presentation condition : With dealer guarantee ; Price on request Gmtbroker Reference: 3950J An 18k Yellow Gold Perpetual Calendar Gents Wristwatch, silver dial with applied hour markers, month and leap year indicator at 3 0'clock , date and moonphase aperture at 6 0'clock , weekday and am/pm indicator at 9 0'clock , a fixed 18k yellow gold bezel, a brand new original black leather strap with an 18k  yellow gold pin buckle (not by Patek Philippe), sapphire glass, exhibition caseback, an additional 18k yellow gold caseback, automatic movement, in excellent condition, comes complete with an original Patek Philippe box and Undated Papers.