[Project 1] Addendum

Yesterday I got asked if the Luke Skywalker Jedi Knight is definitly a early ROTJ-version or some part of a different, rejected Line.
I thought this question is answered by my previous posts and as a matter of fact they really answer it, but to make it clear once and for all, I found this early commercial from the ROTJ-Line:

As you can see on the lower left, there is the Luke Skywalker Prototype figure.