You can't match it to something in another private collection without knowing the provenance of the other piece. In that case, you get into one of those circular Elstree Props arguments.
Neither of the photos above are close to what's seen on screen (in two different scenes where a close-up is clear and available) and neither seem to match the one in the Star Wars to Indy book, either, which I'm looking at right now. I'm not calling it a fake, I'm saying that it doesn't match any of the readily available reference material, so buyer should beware. $9,999 is a lot of money to spend on a prayer.