Rolesium is Rolex’s name for a watch that pairs stainless steel with platinum. It is not a metal of its own. The watch is built from separate steel parts and platinum parts, with no special alloy. The name sits beside Rolesor, Rolex’s word for steel with gold.
Is Rolesium a special alloy?
No. Modern Rolesium watches use no special alloy. The word describes how a watch is put together, not what any single part is made of. Some parts are stainless steel. Others are platinum. Each part keeps its own metal, and the two are not blended. A 2020 article described Rolesium as Oystersteel with platinum. So when a Rolex is called Rolesium, read it as a label for two metals used side by side on one watch.
Where it comes from
Hans Wilsdorf first registered the Rolesium name in 1932. At first the word meant something else. In the early years, Rolex used the longer name Rolésium Inaltérable for its own blend of stainless steel. It did not then refer to a pairing of steel and platinum. The modern sense, a watch built from steel parts and platinum parts, came later.
Which watches are made in Rolesium?
Rolex brought out a Yacht-Master in Rolesium in 1999. The reference 16622 was the first Rolesium Yacht-Master for men. On the first generation of the Rolesium Yacht-Master, the dial was made of 950 platinum. In 2020 an article said Rolesium was found only in the Yacht-Master line. In 2026 Rolex brought out the first Rolesium Daytona. On that watch, platinum is kept to a few parts: the ring on the caseback and the narrow band around the bezel.
Not to be confused with
Rolesor is Rolex’s word for a watch that combines stainless steel with gold. Rolesium follows the same idea but uses platinum in place of gold. Both names describe two metals on one watch. Rolésium Inaltérable is an older use of the name. In the early years it meant Rolex’s own blend of stainless steel, not steel with platinum.
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