At BaselWorld 2013, Rolex presented a new version of the GMT-Master II. This new version introduces for the first time a two-colour ceramic bezel in blue and black, representing day and night.
The Cerachrom bezel offers several advantages as they are virtually scratchproof, resistant to corrosion and they are unaffected by exposure to light or sea water. To inscribe the numerals and graduations on such a hard material, Rolex developed a process which culminates in their being coated with a thin layer of platinum. It takes about 40 hours to produce each Cerachrom bezel.
For the rest, the features of the new Rolex GMT-Master II (ref. 116710BLNR) are not changed: 40 mm Oyster case, Triplock triple waterproof winding crown, water resistant to 100 mt, bidirectional rotatable 24-hour graduated bezel, black lacquer dial, second time zone with independent rapid-setting of the hour hand, date with cyclops, steel bracelet with Oysterlock safety clasp with 5 mm comfort extension link.