The Rolex Yacht-Master II 126680 is a purpose-built sporty regatta chronograph housed in a commanding 44mm Oystersteel Oyster case with 100 meters of water resistance, a Triplock screw-down crown, and dedicated pusher-operated timing controls. Its matte white lacquered dial features applied 18ct white gold hour markers and hands with Chromalight lume, while a redesigned sloped flange carries the regatta countdown scale for improved on-water legibility. At the heart of this Rolex Yacht-Master II is the new in-house Caliber 4162, an automatic chronograph movement with a column wheel, vertical clutch, Chronergy escapement, blue Parachrom hairspring, and a 72-hour power reserve, certified to Superlative Chronometer standards of +2/-2 seconds per day. The standout complication is the programmable countdown timer with mechanical memory and on-the-fly synchronization, purpose-engineered for competitive sailing start sequences. A unidirectional rotating bezel with a blue Cerachrom insert and 60-minute graduated scale gives this Rolex Yacht-Master II 126680 its signature nautical character. Completed by a wider-profile Oyster bracelet with brushed outer links, polished center links, Oysterlock clasp, and Easylink comfort extension, the Rolex Yacht-Master II 126680 is one of the most technically advanced watches in the Rolex Professional collection.