This is a Tudor Black Bay 41 Heritage, reference 79540, featuring a striking blue dial and a 41 mm stainless steel case in the classic Black Bay style. It is powered by an automatic movement based on the reliable ETA 2824-2 (also known as Calibre T600), with roughly 38 hours of power reserve and a screw-down crown offering 150 m water resistance. Your example, dated 2021, comes as a full set with its original box, Tudor warranty card, booklets, and tag—all in place. On the wrist, this watch strikes a superb balance between sporty robustness and elegant restraint. The slim profile—just over 11 mm thick with a 22 mm lug width—makes it comfortable and versatile for daily wear. The condition appears honest with natural light ageing rather than heavy polish, while signature features like the bold snowflake hands, polished bezel, and matte blue dial remain crisp and collectible.