Since its launch in the 1960s, the playfully nicknamed “Root Beer” edition of the GMT Master-II was the first GMT model to feature a two-tone case and bezel and has become a favorite amongst Rolex fans. The two-tone design was created to differentiate between daylight and nighttime hours in the second time zone, perfect for the world traveler. The 126711CHNR has a 40mm case made of stainless steel and rose gold with a monobloc middle case, a screw-down case back, a scratch-resistant sapphire and a winding crown. The 126711CHNR dial is black with luminous hour markers and rose gold hands. The bezel is a 24-hour graduated rotatable bidirectional ceramic piece with a two-color brown and black design with engraved numerals and graduations. The 126711CHNR is powered by the self-winding caliber 3285 with GMT and Date functionality as well as a power reserve of up to 70 hours. The classic case is paired with stainless steel and rose gold (Everose Rolesor) oyster bracelet that has a fold-over clasp. It has a water resistance of 100 meters (330 feet).