Well, I guess I have to question any casino attribution.
I have 5 different including two different yellow $5 and a brown 25¢.

They were given to me by an exc host at the Four Queens way back in the 1980's.
He was there when the FQ's opened in 1966. They were samples of the newly ordered rack chips.

I also believe they were sold as generic chips. Could a casino have used them? Sure but which brown chip was used and which brown chip wasn't?

The host's name was Kozloff. Sound familiar?
He also gave me chips his brother used in several Caribbean operations.