This is an original, authentic Rolex Explorer II “Polar” white “Chicchi Di Mais” stainless steel GMT date wristwatch reference number 16570 dating to the circa 1989-1998 era, with the rare factory original optional 93150 divers extension bracelet. This example has a light and creamy “Chicchi Di Mais” aged tritium lume. The watch has been authenticated. The Rolex reference number 16570 Explorer II or Explorer 2 features a 40mm stainless steel case and is the “Polar” variant showing a white Rolex dial with black surrounds and lettering. This example appears to be all correct and shows the “holey” lugs and is the earlier Tritium model with the mark on the bottom of the dial, “SWISS-T<25” confirming this, which puts the watch in the 1989-1998 era. The watch houses the Rolex Caliber 3185 movement. This example has the original factory optional 93150 Rolex Submariner 93150 divers extension bracelet, when buying an Explorer in the late 90’s buyers were given the option of ordering with the 93150 bracelet, a rare addition as most of these heavy link bracelets with divers extensions are found on the submariner and submariner oyster perpetual (501B end links). Additional features include the fixed stainless steel bezel with engraved black 24-hour scale, sapphire crystal with cyclops date magnification lens. The watch functions included local time (Mercedes hands), reference hour (red arrow-tipped 24-hour hand, GMT), and date window at 3 o’clock. This watch functions properly and was found to be an authentic example by the experts at Last Wind-Up in Bozeman, Montana. The watch is well kept and works correctly. The lume has a light and creamy, Chicchi Di Mais coloring, a rare and collectible feature. The Rolex Explorer II or Rolex Explorer 2 began its journey in the early 1970’s, a time when mankind was pushing back the frontiers of exploration in space, the depths of the ocean and the bowels of the earth. This discovery of the new horizons gave way to practice new sports and discovery, founding new Explorers. The Explorer traveled on the wrist of Norwegian adventurer Nils Lund during the Rondespiret Expedition (The Rhonde Spire) to the Southern part of Rondane in Antarctica in 1996-1997. The Explorer was the first watch to reach the summit of Everest, and Explorer II was the first to climb the 2,427-meter Rondespiret, under extreme conditions and return as good as new.