Until Paul-Son began production in the 70's, there were ony 3 manfacturers of clay compression molded chips. USPC, Burt, and TR King. All clay chips can be attributed to one of the 3. Today there are only 2. Paul-Son and TR King.
All other chips are plastic/clay composit or just plain plastic injection molded chips.

David, Re: Flamingo chip. We might have 2 different chips. I will have to make a visit to the safety deposit box.