The Black Bay One One 31/36/39/41 models bring a unique aesthetic to the Black Bay One line. The curved cases feature a combination of finishes that elevates the watch in a contemporary fashion and offers a design language that slightly departs from the brands ic onic tool watch spirit to embrace a sophisticated, versatile, unisex chic look and feel. Fitted with Manufacture Calibres these mode ls are at the cutting edge of technical watchmaking refinement. All Black Bay One One 31/36/39/41 models are available on a five lin k bracelet in 316L steel. It comes complete with a robust clasp in 316L steel with TUDOR T fit rapid adjustment system for on the fly size changes. Easy to use, requiring no tools and offering five positions, this practical system allows the wearer to carry out a fine, instant adjustment of up to 8mm on the clasp.