The 116520 also featured a brand new case style with thicker lugs and a polished bezel. In 2016, Rolex launched the latest Variation with the Daytona, the reference 116500LN, which features a ceramic bezel and a black dial with white sub-dials. Please Observe that the watch cannot be operated underwater. https://www.watchesworld.com/a-history-of-watch-reference-numbers/