I was going through some boxes today and found two more -1 versions that I happened to have the non -1 versions of. After some close inspection, I found the differences in both boxes and have attached pics.
The first is Casino Kid -- the first version has a green text box on the back and the revision has a yellow box.
The second is Win, Lose or Draw (this variation took a while to find!). The first version on the front of the box has a noticeable space between the letters "T" and "V" (see pic). The revision box has this corrected, but that's all I could find different.
-Dain