I believe them to be compression molded clay, Gene. They are the same weight and vintage as the Dice and Cards and the NEVADA mold chips Bill sold and have the same textured surface pattern. There are no mold-gate marks that I can see on them. I was told they were used to supply to customers who wanted an inexpensive chip with no design.

You could buy these from Gamblers General last year by the box. They were all purchased by someone as the store has been out for many months. I believe I bought only one of each color and design for my sample collection.