Men's Audemars Piguet Calibre 4302 Automatic movement, silver dial with index hour markers and minute markers at the outer rim. Features luminous hands, date display at three o'clock, octagonal stainless steel case of 41mm diameter and 10.4mm thickness; fixed bezel, sapphire crystal glass, screw-in case back. Equipped with a power reserve of about 70 hours, scratch-resistant sapphire crystal, water resistance to 50 meters (approx. 165 ft). Includes automatic winding mechanism for the mainspring.