Hier zum Thema Everose, aus der Rolex Webpage:

18 CT EVEROSE GOLD

AN EXCLUSIVE PATENT

To preserve the beauty of its pink gold watches, Rolex created and patented an exclusive 18 ct pink gold alloy cast in its own foundry: Everose gold. Introduced in 2005, 18 ct Everose is used on all Rolex Oyster models in pink gold.