Also Current to the dial and hands is Rolex’s Chromalight lume. This more recent in-house content was initially introduced in 2008 as Rolex’s proprietary luminescent compound and due to the fact its introduction, it's got entirely replaced Super-LumiNova in the manufacturer’s lineup. Rolex helps make about 1M watches a calendar https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/