Tudor added to the famous Heritage Black Bay a new model, its first in-house chronograph with Manufacture Calibre MT5813, column wheel and vertical clutch. The new hybrid Heritage Black Bay Chrono chronograph dares to combine the aquatic heritage represented by the Black Bay family with the queen of the racetrack, the chronograph. Boasting a 70-hour power reserve, a silicon balance spring and certification by the Swiss Official Chronometer Testing Institute, the Manufacture chronograph Calibre MT5813 that drives the Heritage Black Bay Chrono model is a high-performance movement. Crafted in the purest watchmaking tradition, it features a column wheel mechanism and vertical clutch. In keeping with the Tudor philosophy of quality, it presents extraordinary robustness and reliability, guaranteed by an array of extreme tests applied to all Tudor products.