Patek Philippe Grand Complications Perpetual Calendar 5320G-011 self-winding mechanical watch features a 40mm 18k white gold case surrounding a rose-gilt opaline dial on a brown alligator leather strap with an 18k white gold folding buckle. Functions include hours, minutes, seconds, perpetual calendar with day, date, month; moonphase, day/night indicator, leap year indicator. This watch is powered by the Manufacture Movement Caliber 324 S Q. This watch is water-resistant to 30m. This watch comes with interchangeable solid and sapphire case backs.