39mm steel case with polished and satin finish. Riveted steel bracelet with polished and satin finish, and TUDOR “T-fit” clasp with rapid adjustment. 24-hour graduated fixed bezel in satin-brushed steel. Manufacture Calibre MT5652 (COSC), Self-winding mechanical movement with bidirectional rotor system, built-in architecture. Opaline, domed. Screw-down winding crown in steel with the TUDOR rose in relief. Domed sapphire crystal. Waterproof to 200m (660 ft). The Black Bay Pro is a robust watch featuring a 24-hour graduated satin-brushed fixed bezel and a yellow 24-hour "Snowflake" hand, all powered by the TUDOR Manufacture Calibre MT5652 with a built-in GMT function. Now the design is pushed even further, with an opaline dial that boosts legibility. The ceramic markers are outlined in black, as are the hands, to create a bold contrast that bolsters the design, making it suitable for any type of exploration, whether polar or subterranean.