Nah, that's just an illusion.
The Klaatu is hanging out the side door and his vest just happens to follow the "cutout" line. You can clearly see his right arm and the bluescreen background behind his hip.
Other pics on the page were from the BTM CD and all are the same size and resolution, so I'm assuming this one's from the CD as well.
In any case, I take it that this is a no-go. Yet another ROTJ prop with no visual history.
I wonder what happened to all these axes and staffs? Has an original ever popped up on Propstore? I love these things.