GMT-Master II 16710

Replaced the 16760 with a slimmer case and cal. 3185. The last aluminium-insert GMT-Master II, with Pepsi, Coke or black bezels; a suffix on the reference denotes the bezelBezelThe frame surrounding the crystal at the front of a watch.. Lume moved from tritiumTritiumA radioactive luminous-paint ingredient used on many vintage watches after radium. On RAF IWC Mark 11 replacement dials, an encircled T identified the tritium specification. to LuminovaLumiNova and Super-LumiNovaTrade names for luminous coatings that absorb light and release it in darkness. These non-radioactive materials differ from radium- and tritium-based lume. to ; drilled lugs were dropped in 2003 and cal. 3186 arrived in late 2007.