I'm not sure, Dave. The USPC photos that I have copies are from over 300 photos that Howard Herz took at the USPC Co. in 1979. It shows an order for 9,000 chips in 9 colors of blank large crown chips that were made in 1929 and are probably clay composition.

The colors shown are slightly different from the 6 colors of my paper large crown chips. These were hot-stamped in gold for me by Hank Boss with my initials. The colors are white, red, navy, yellow, green & brown.