I have a hundred or so different Chipco Artwork Proof sheets for sale. Here is the index page.
http://proofs.marlowcasinochips.com/
Shipping is a flat rate $2 for as many as you buy sent in a board backed envelope. Chipboard readers deduct 10% from marked prices.

Chipco salesman call them waxed copies. (good quality prints) In the past Chipco sent them snail mail to the salesmen for delivery to casinos. The casino would sign off on the art work. In NV, Chipco sends a signed copy of the art work for gaming approval. This process is nearly all done by email now. There have not been many waxed copies for nearly 3 years. They make nice displays in cheap 9" x 12" frames.