18K white gold case 41mm fitted with original croco leather strap with original 18K deployant buckle. Blue dial with silver-toned hands and index hour markers. Tachymeter scale appears around the outer rim. Patek Philippe Calibre CH 29-535 PS Q , manual winding movement with about 65 hours of power reserve. Scratch resistant sapphire crystal. Water resistant at 30 meters / 100 feet. Functions: perpetual calendar, moon phase, chronograph, column wheel, leap year, month, date, day, hour, minute, small second, day/night indicator. Box & Cert Dated Feb 2015.