Possibly, though it would have to be measured in size to make sure that it would be close. Looking at the three holes in it, I don't personally think it was this, as the ANH mystery disc had a single dark spot in its center, rather than three smaller holes in the circle. The real Mystery Disc greeblie, if it indeed was a greeblie, would have been roughly the size of a quarter, akin to the Imperial Disc without the square notch.