I picked them up in Las Vegas on Feb. 11, 2009 from a guy who was a Roulette player at Hard Rock. He told me that these chips were on one of the Tables at Hard Rock for a short period of time (a week or so) when they were remodeling and relocating some of the Roulette Tables. I have never been able to verify his story but I have no reason to believe he was lying to me.
Short of having a picture of these "Generic" chips on a Table at Hard Rock it will be almost impossible to really verify their use at Hard Rock.
I have 6 colors of the chips - I am missing the Green one. He gave me the chips as a gift.
Take care,
"Mr. Roulette"