The latest addition to join the iconic Black Bay Fifty-Eight collection, this new TUDOR Black Bay Fifty-Eight Navy Blue Automatic Men\'s Watch showcases a striking all-blue aesthetic, boasting a smaller and slimmer case size than previous chunky Black Bay watches. At A Glance  Presented on a stainless steel bracelet with folding clasp fastening 39mm steel polished and satin case size 200m waterproof Striking all-blue navy domed dial and unidirectional rotating bezel Index hour markers with iconic snowflake hands Large steel screw-down winding crown Scratch resistant domed sapphire crystal glass Powered by the in-house Manufacture Calibre MT5402 (COSC) Self-winding mechanical movement with bidirectional rotor system Power reserve of 70 hours Officially certified as a chronometer by the Swiss Official Chronometer Testing Institute (COSC)