Patek PhilippeMen Grand Complications Watch - 5940J-001

37mm x 44.6mm 18K yellow gold case, interchangeable full back and sapphire crystal back, grained cream-colored dial with gold applied numerals, ultra-thin self-winding Caliber 240 Q movement with perpetual calendar, interchangeable full back and sapphire-crystal case back, day, date, month, leap year by hands, moon phases and 24-hour indicators, approximately 38-48 hours of power reserve, hand-stitched matt chocolate brown alligator strap with with square scales, prong buckle. Water resistant to 30 meters.