Patek Philippe Grand Complications Perpetual Calendar Moon Phase Watch - 5140P-017

37.2 mm platinum case, interchangeable full back and sapphire crystal case back, charcoal gray sunburst dial with gold applied hour markers, caliber 240 Q self-winding movement with perpetual calendar (day, date, month, leap year by hands, moon phases, 24-hour dial), approximately 38-48 hours of power reserve, shiny black alligator strap with square scales, fold-over buckle. Water resistant to 30 m.