The 116520 also featured a different case style with thicker lugs and a cultured bezel. In 2016, Rolex introduced the latest Model with the Daytona, the reference 116500LN, which includes a ceramic bezel in addition to a black dial with white sub-dials. Maybe most important with respect to horological history https://www.watchesworld.com/a-history-of-watch-reference-numbers/