Armin knows the history of these, Bracken. I have bought some from him from time to time. There are tokens from other casinos than Thunderbird, Hacienda, and Landmark. They are not casino-issues, but commemoratives made as souvenirs.

Believe me, they are scarce, and worth more than silver melt value, generally in the $15-75 range, depending on the hotel. Vince Mowery also has these for sale from time to time.