Funny eBay find. I think GL Marketing missed it, though. It should have been a clock pin, with OMM reciting "My time is yours ... Go ahead" during the backlight-button press.

Also, if the scope print is before the 1983 U.S. retail video releases, then it should be the Lucas re-integration of studio-cut missing scenes -- which would make it a restoration of his first director's cut.

I'm still piecing this together, but my research is starting to indicate that George Lucas was always tinkering, even before Star Wars. The 1983+ retail video releases of THX 1138 may have been his second director's cut -- and SEN's missing scene (one example in this thread) was removed (or re-removed) by GL himself.
His third director's cut would then be the latest DVD / Blu-ray CG-extravaganza releases.