Patek Philippe Grand Complications Perpetual Calendar Chronograph (3970EP019) manual wind watch, features a 36.7mm platinum case surrounding a black diamond dial on a black alligator strap with a platinum Calatrava Cross deployant buckle. Functions include hours, minutes, small seconds, day, date, month, moon phase, perpetual calendar and chronograph. This watch comes with the Factory seal and the original warranty and instruction manual. We back this watch with a 2-Year WatchBox warranty!