I believe this scan is of E9239C, as the reverse is smeared as if an overstamp were removed. It's apparently from the same series as the 50c chip N8561 from the 1970's. I don't believe this chip was ever used in the casino.

Does anyone know what the 10c chip listed above it in TCR looks like? It is called TCR E1087; a different catalog number so must be a different design?