Patek Philippe Grand Complications Retrograde Perpetual Calendar 5160/500G-001 self-winding mechanical watch features a hand engraved 38mm 18k white gold case surrounding a silver dial on a black alligator leather strap with an engraved 18k white gold deployant buckle. Functions include hours, minutes, seconds, day, retrograde date, month, leap year indicator, and moonphase. This watch is powered by the Manufacture Movement Caliber 324 S QR. This watch is water-resistant to 30m.