Description: Rolex Explorer 124270 Pre-owned Rolex Explorer ref 124270 (2021) marked the return of the Explorer 36 during its debut in 2021. The traditionally no-nonsense tool watch had always been a compact 36mm. However, Rolex began experimenting with more contemporary options in 2010 with an upsized 39mm model. With the larger case size, the Explorer 36 was discontinued. Thankfully for the purists, the Explorer in its original form (and with a slew