these watches bear a small engraved number on the back, does anyone know how many were produced ? I am speaking about the "pre CPCP" version. I believe the production started in 1994.
The introduction of screw down pushers and a larger winding crown in the mid 1960’s changed both the aspect the status of the Rolex Cosmograph: although is still had the same diameter, the watch appeared bigger and more rugged. The mention Oyster on the dial was an additional part of pure Rolex DNA
1950's Rolex ad for the Explorer (Credit: Jake's Rolex Watch Blog) Most people believe that the Explorer I was launched by Rolex for commemorating the Everest expedition and that this watch was with British explorer team consisting of Edmund Hillary and Sherpa Tenzing Norgay etc on 29th, May of 1953