I don't remember that one being "Elstree verified" (which doesn't mean squat these days), but that was sold from the Kurtz/Joiner collection a couple years back. It is odd that saber has the same unusual shaped grips as the Stormtrooper blaster that sold at the same time. The grips match nothing on any of the well known screen used pieces.
As for the ESB saber that we're discussing here. I do believe it was originally the ANH V2, but the grips were replaced with longer ones and wires were added for ESB. There is very little reference of the ANH V2, but it did have black sidebars and some chips in the emitter shroud like this one. So far this saber is only spotted in ROTJ promo shots and not the movie itself. There are very few clear shots of any Vader saber in ROTJ though.
