I got the Red Fox chips today. I only got to play with them for a second before running out again. But if these things are clay, I'll eat one.I just came across this thread recently, and I wanted to let you know that there may be at least one manufacturer of compression clay molded chips in the United States that has been overlooked.
According to Robert Eisenstadt’s clay chip rim mold guide, http://www.antiquegamblingchips.com/molddesign_other.htm, K.P Gaming Supplies is an American Indian owned gambling supply business that has apparently been manufacturing molded clay chips since the mid-1990s. I believe that they produce two styles of compression clay chips, which they sell to Indian casinos and card rooms, mainly in California, one an “Aztec” design, and the other a 4 suits, and Thunderbird design. I've posted a photo I just took of the two chip mold designs, below. I've handled stacks of the chips, and they are very nice chips, more similar to Paulsons than anything else.
They must be a really small company, because there is almost no information about them on the internet. Eisenstadt lists them as being located at 12121 Madera Way, Riverside CA 92503, however I found their very minimal Facebook page, which lists there address as 210 Crourse Dr., Corona, CA 92879. The link to their website on the Facebook page goes to a non-gambling related Chinese language website.
Here is their minimal and Facebook page; https://www.facebook.com/pages/K-P-Gaming-Supplies/115448448477960
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I'll do some experiments later and post.