I am stumped. I have a over stamp 25th Anniversary casino chip. The single chip Pic is what the Chip looked like when produced..My chips are all over stamped like the one on the right..Now....the one on the left ,,look close, it has the same marking as the one issued..BUT has balls around circle & a Star in the middle..the star in behind the bust..the bust isn't an over stamp..HELP..! If anyone Has ideas Please let me knowBob.