You will find a lot of pics in this thread

Steve McQueen and his Rolex...

but this sounds very strange:

Original von larsk
Steve McQueen never really wore the Explorer II [ref. 1655], but rather the Rolex Submariner [ref. 5512], which nonetheless featured a very similar design to the Explorer II [ref. 1655]...
I suppose must of the members will not agree, concerning similarity between 5512 and 1655