Patek Philippe Grand Complication Perpetual Calendar White Gold Mens Watch 5139. Ultra-thin automatic self-winding mechanical movement. Rhodium plated, fausses cotes decoration, straight-line lever escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, free-sprung self-compensating flat balance spring, 22k gold micro-rotor. 18K white gold round case 38.0 mm in diameter. 8.5 mm thickness. Transparent exhibition sapphire crystal caseback. Patek Philippe logo on the crown. 18k white gold hobnail bezel. Scratch resistant sapphire crystal. Grey dial with raised white gold baton hour markers and sage leaf-shaped hands. Three subdials displaying day, date, and month, along with a moon phase display inside the 6 o'clock subdial. Brown leather strap with an 18K white gold Patek Philippe deployant clasp. Excellent condition.