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.