Tudor Black Bay Chrono 41 mmThe Manufacture Chronograph Calibre MT5813, which powers the Black Bay Chrono model, displays hour, minute, second, chronograph and date functions. It has the finish typical of TUDOR Manufacture Calibres. Its rotor in tungsten monobloc is openwork and satin brushed with sand blasted details, and its bridges and mainplate have alternate sand blasted and polished surfaces with laser decorations. Waterproofness: Waterproof to 200m (660 ft) Bezel: Fixed