Authentic Tudor Black Bay S&G model m79663-0005. Features a brushed and polished yellow gold tone capped stainless steel case with a matching watch band equipped with a solid brushed and polished stainless steel folding clasp. Includes a screw-down crown and scratch-resistant sapphire crystal. The round 39mm case houses a Swiss automatic chronometer movement, the Tudor Calibre MT5602 engine, providing a 70-hour power reserve. Display shows hours, minutes, seconds with luminous yellow gold tone hands and circle/stick hour markers along with minute markers on the outer rim of its yellow gold tone dial. Water resistant to 100 meters (approx. 330 feet). Comes with a 5-year WatchMaxx warranty.