Posted the Horseshoe Reno Centiennial chip but didn't mention the reversible color scheme.
Well...jeez, can anyone think of some other live chips that were different colors obverse/reverse? I've got these Four Queens Win Card chips but they are NCVs.

I got these ('01 issue) during my only ever downtown Las Vegas foray the Sunday after the '01 convention. TCR has the 5 rated C and the 1 at B. Wow, must be lots around for sale! Not these though.