I believe that these are prototypes from the Circus Circus in Las Vegas. I found 2 of the $25, and 3 each of the rest. I believe that these 14 chips are the only ones in existance. What makes them very interesting is that they are not cancelled, which is abnormal for prototypes. As such, they might be an old backup set. I have sold one set. One of the $1 chips is on eBay. I am interested in selling the other sets as well, and they are priced relative to their scarcity and condition. Please email me if you would like more details.

Thanks,

John