A 43mm divers\' watch, this Tudor Black Bay Bronze Automatic Men\'s Watch takes inspiration from Tudor\'s extensive history, finished with the Tudor Manufacture Calibre MT5601 for unrivalled precision. At A Glance  Presented on a slate grey fabric strap with a bronze buckle 43mm bronze case with a bronze-coloured PVD-treated steel case back and satin finish Unidirectional rotatable bezel in bronze with a 60-minute graduated disc Waterproof to 200m Domed and scratch-resistant sapphire crystal Domed slate grey dial with the Tudor \'Snowflake\' hands Powered by the Manufacture Calibre MT5601 (COSC) Self-winding mechanical movement with bidirectional rotor system Power reserve of approximately 70 hours