Close-Up: Rolex Yacht-Master in Rolesium
The Rolex Oyster Perpetual Yacht-Master, a sailors’ watch introduced in 1992, underwent a major facelift in both its design and technology in 2012. In this popular article from the WatchTime archives, we take a closer look at it.
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.
Inside the Yacht-Master beats Rolex’s manufacture Caliber 3135, an automatic movement that has been certified by the Swiss testing agency COSC as a chronometer. Lik...
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