Rolex Explorer 14270 Black Out DialThe Rarest Rolex Sapphire Sports Watch The Rolex Explorer is one of the most iconic looking and easy to recognize Rolex sports watches, thanks to its bold Arabic 3 6 9 hour marker dial layout. 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 numerals instead of regular luminous material and