Sleek, sporty, distinguished: the Oyster Perpetual Yacht-Master symbolizes the privileged ties between Rolex and the world of sailing that stretch back to the 1950s. First introduced in 1992, it is the only Oyster Professional model offered in three sizes: 42, 40 and 37 mm. In 2007, the brand released the Rolex Yacht-Master II regatta chronograph watch, the world's first watch equipped with a programmable countdown from 1 to 10 minutes using a mechanical memory. All Rolex Yacht-master models have a water resistance rating of 100 metres and a triple-locking winding crown system taken from Rolex's famous family of saturation diving watches.