The Fine People at Gaming Archeology, Howard Hertz told me this chip was manufactured in 1955 for RH Gray in Grand Junction Colorado. It is probably part of a larger set with denominations in $1,$5, maybe $25. For sale or trade. I am asking 3.00 ea for sale shipping included, or 2.00 ea in trade. I have only 8 left, so supply is limited. Email me if interested!