This is the original Rolex Explorer II and it is only 36mm compared to the current Explorer II which is 40mm, so this watch is the size of a current Datejust or Day-Date...
Historically Rolex has always been extremely secretive and discreet, and no journalists in the past have ever been invited "INSIDE ROLEX" to explore and report on all four Rolex Manufacturing faclities in Switzerland.
In November 2013, this changed when Rolex invited Jake to take an unprecdented journey into the heart of Rolex to learn and report on everything he witnessed and learned.
This Super-Detailed 3 Part Story is a "MUST READ" story for anybody who wants to understand what really makes Rolex tick.