Firstly I suggest you go to the club site and read the section on 'Brass Cores' - you will find several 'specific' examples there.

I believe the club may be investigating others as we speak. - Go to the club site message board and read the thread into which Mike Skelton posted this morning.

"then why are not current $100 chips being done and cashed in ..... ?? "

One casino was recently stung for $30,000. Another for an undisclosed sum.
For all you know there are others that havnt discovered it yet. The best frauds are never detected.