Celebrating 50 years of their chronographs, the new TUDOR Black Bay Chrono Automatic Men\'s Watch boasts a reworked case and contrasting sub-counters in tradition of the sports chronograph, whilst remaining faithful to the Black Bay aesthetic. At A Glance  Presented on a riveted 316L steel bracelet with polished and satin finish 41mm 316L steel case with polished and satin finish Fixed 316L steel bezel with matt black anodised aluminium disc, tachymetric scale and silver markings Screw down winding crown with the TUDOR rose in relief, and screw down pushers at 2 o\'clock and 4 o\'clock Opaline dial with black counters and date window at 6 o\'clock “Snowflake” hands, one of the hallmarks of the TUDOR divers’ watches introduced in 1969, with grade A, Swiss Super-LumiNova® luminescent material Waterproof to 200m Scratch resistant domed sapphire crystal Powered by the self-winding mechanical chronograph movement with bi-directional rotor system, Calibre MT5813 Power reserve of 70 hours Swiss chronometer officially certified by COSC