Rolex Explorer 14270 'Black Out' Dial B&PThe Rarest Rolex Sapphire Sports Watch The Rolex Explorer has been a staple of the Rolex sports watch collection since the 1950s and has been among the preferred watches for expeditions and adventures up to the highest peaks of the world. In the early 1990s Rolex introduced the sapphire glass 14270 Explorer with applied 3 6 9 numerals, where before they had always been painted. There were some early very rare examples that had black enamel filled