The Tudor Black Bay Chrono reference 79350 marked Tudor's return to the chronograph segment when introduced at Baselworld 2017, integrating the brand's first in-house chronograph movement into the Black Bay diver chassis. The reference represents a long-running collaboration between Tudor and Breitling, with Tudor's MT5813 and Breitling's B01 calibers sharing architecture while each brand maintains its own finishing and component choices. The 41mm stainless steel case retains the diver heritage of the Black Bay line with a screw-down crown and 200-meter water resistance, paired with a fixed steel tachymeter bezel that distinguishes the chronograph from its dive-watch siblings. The matte black dial features applied luminous markers, Tudor's signature snowflake hands, and a bi-compax layout with running seconds at nine and a 45-minute counter at three. Powered by the Tudor Caliber MT5813, an integrated chronograph movement with vertical clutch and column-wheel control, COSC-certified, beating at 28,800 vibrations per hour across 41 jewels with a 70-hour power reserve and a silicon balance spring. Domed sapphire crystal completes the construction. 2019 production, pre-owned with full Tudor box and papers.