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 iconic tool watch spirit to embrace a sophisticated, versatile, unisex chic look and feel. Fitted with Manufacture Calibres these models are at the cutting edge of technical watchmaking refinement. All Black Bay One One 31/36/39/41 models are available on a five link bracelet in 316L steel. It comes complete with a robust clasp in 316L steel with TUDORT fitrapid 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.