This is a Silver Strike Rock Guitar Collectible - the $10.00 prize in special slot machines. There were several designs that were considered collectible items. They could be cashed in for $10.00. The coins are in plastic cases to protect them. It became a service nightmare, as the cases chipped, bouncing around in the machines... the fragments jammed up the works of the machines. There were usually 3 or 4 designs (keep playing until you win them all!), and designs were changed periodically, keeping collectors coming back.
These coins are .999 fine silver.
This chip features the Gibson Les Paul guitar in silver with the outer circle in copper. The back shows the Hard Rock Hotel logo, Rock Guitar Collectibles. On the back is the mint mark "G" for Global Minting.