The Tudor Black Bay 39 features a fixed steel bezel and has a Manufacture Calibre MT5602 (COSC) movement with a non-magnetic silicon balance spring. With a 70-hour power reserve and waterproof to 100m,the Black Bay 39 departs from Tudor's tool watch spirit and offers a sophisticated,versatile,unisex look. The case features a combination of finishes,with polished and domed sides,a curved design,and a curved winding crown. The five-link bracelet comes with a TUDOR "T-fit" clasp,with rapid adjustment. The watch borrows elements from TUDOR's dive watches from the 1950s and 1960s,such as the angular "Snowflake" hands and white index markers seen on the anthracite dial.