The 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. The model is available mounted on a 5-link stainless steel bracelet or a 3-link stainless steel “rivet style” bracelet. Both bracelets feature TUDOR’s “T-fit” rapid adjustment clasp. Easy to use, requiring no tools and offering five positions, this practical system allows wearers to carry out a fine, instant adjustment of the total length of the bracelet along an adjustment window of 8mm.