18kt yellow gold case. Brown alligator strap with 18kt yellow gold ardillon buckle. Chrono Reflex movement. 18kt yellow gold octagonal crown set with a faceted sapphire. Silver grained dial. Roman numeral hour markers. Sword-shaped blued steel hands. Quartz movement. Water resistant at 30 meters (100 feet). Cartier Tank American 18kt Yellow Gold Chronograph Mens Watch W2605856 