TUDOR Black Bay Chrono Carbon 25 Watch M79377KN-0001. TUDOR has been tied to motorsport since the 50s. The Black Bay Chrono Carbon 25, with a case rendered entirely in carbon fibre, including the end-links, with titanium pushers, marks a long history of TUDOR going wheel to wheel with racing teams. With a tech forward, redesigned lightweight case, column wheel Manufacture Calibre and an aesthetic inspired by the Visa Cash App Racing Bulls Formula One Team, the Black Bay Chrono Carbon 25 laps the competition. For a purely aesthetic touch, even the chronograph sub-counters are rendered in carbon fibre.