Built around Breitling's exclusive black matt Ultralight Polymer Breitlight case measuring 44mm, the Endurance PRO X82310D51B1S1 is a sports chronograph designed for legibility and durability. The black dial features luminous polished hands, applied polished large Arabic numerals at 3, 6, and 9 o'clock, and smaller luminous painted Arabic numerals at the remaining hour positions — all framed by a white-outlined minute and seconds track at the dial perimeter.
Chronograph functions are laid out across three sub-dials: a large red central seconds counter hand, a 1/10-of-a-second counter sub-dial at the 2–3 o'clock zone, and a 30-minute counter sub-dial at the 9–10 o'clock position. A date window sits between 4 and 5 o'clock, and a small seconds sub-dial occupies 6 o'clock. The bidirectional bezel is engraved with a compass scale, while the crown and chronograph pushers carry matching blue accents. The sapphire crystal is glare-proofed on both sides, and water resistance reaches 100m/330ft.
Power comes from the COSC-certified Breitling Thermocompensated SuperQuartz caliber 82. The watch is presented on a blue rubber Diver Pro strap secured by a tang buckle clasp, and is accompanied by the original Breitling watch box and Breitling papers.
