Patek Philippe Grand Complications Perpetual Calendar 7140R-001 self-winding mechanical watch features a 35.1mm 18k rose gold case with diamond bezel surrounding a silvery-white opaline dial on a mink gray alligator strap with additional royal purple alligator strap with an 18k rose gold diamond set tang buckle. Functions include hours, minutes; perpetual calendar with day, date, month, moon phase, leap year and 24-hour display. This watch is powered by the Ultra-thin self-winding mechanical movement Caliber 240 Q. This watch is water-resistant to 30m. This watch comes with an interchangeable solid and sapphire case backs.