Seen here is the "Productionlike" proof for the Chewbacca 45A back. It distinguishes itself from the "common proof" in a few ways. It is of thicker card stock, has four rounded corners, and has no punch cut.

This piece is considered rare, even for pre-production materials as it may be one of one (or two) of a kind. The other proof like this contained in the Chewseum can be seen here.

The colors just seem brighter and the lines seem cleaner, though that may be psychological.

CLICK HERE TO CHECK OUT THE PROOF IN INSANE-O CLOSE UP

Here is the back of the proof card. The lack of punch really makes the black stand out.

In the insane-o close up (that you can see by clicking here or on the picture) you can read all of the things you needed to do to get the Display Arena. It also has the address in the alliterate town of Monticello, Minnesota.