The Rolex Oyster Perpetual Yacht-Master, a sailors’ watch introduced in 1992, underwent a major facelift recently in both its design and technology. In 2012, Rolex released a version with an Oyster case made of its patented alloy Rolesium, and a cool, blue dial with brushed sunray pattern.
Rolesium, a material developed by Rolex and used here in the Yacht-Master’s 40-mm diameter Oyster case, is an alloy of 904L stainless steel and platinum. The bezel, which rotates in both directions and now has a notched ring with 120 gradations, is made entirely of 950 platinum. It has a smooth, sand-blasted finish, except for the raised numerals and indices, which are polished. The hour markers on the nautical-looking blue dial are made of 18k white gold and filled with a luminescent material called Chromalight, which gives off a strong, blue-tinted glow in the dark.
Rolex’s traditional Oyster case — with a middle piece crafted from a solid block of the corrosion-resistant alloy and a fluted, hermetically screwed caseback — is water-resistant to 100 meters. The screw-down crown is protected by a crown guard built into the middle case and also features the patented Triplock water-proofing system. Another Rolex trademark — the “Cyclops” magnifying lens over the date, is found at 3 o’clock and made of highly scratch-resistant synthetic sapphire.