Rolex Gmt-Master 126711CHNR Root Beer Dial Nov 2020Inside the Ref 126711CHNR is The brand new-technology calibre 3285. Designed and produced in-home by Rolex. It features a Parachrom hairspring, featuring fantastic resistance to shocks and temperature versions. In addition, it features a Chronergy escapement, offering an influence reserve of 70 hrs