Tudor Black Bay One 36 S&G ref. 79643 (2025) features a 36mm stainless steel case with polished and satin finishes, paired with a silver dial accented by diamond hour markers and protected by a flat sapphire crystal. Its fixed steel bezel is capped with 0.3mm of yellow gold, while the screw-down crown, also steel with a yellow gold cap, bears the Tudor rose in relief. Powered by the COSC-certified Manufacture Calibre MT5400 with a 70-hour power reserve, this self-winding timepiece combines precision with luxury. The two-tone bracelet integrates solid and capped yellow gold links with a Tudor “T-fit” folding clasp and safety catch, complete with a solid gold logo, blending refined style with durable functionality.