Thanks Oscar! The purple HCE $.25 was a PAN game chip (image of reverse side below.) You probably know the story on this chip and other chips in different denominations but incase anyone else doesn't know it, the HCE mold chips were ordered in the early 1950's by Benny Binion which was around when he was convicted of murder and sent to prison. Joe W. Brown took over the Horseshoe Club and chose to use the chips but not until he had Binion's name scratched off except for the "B". Cheers!
Image courtesy of the ChipGuide.