Jim, That makes it rarer than rare if it is before the casino existed. You might have a REAL error there! Probably worth at least half of face value if you can still redeem it?
What a find!! Maybe Norm could list it under special interest on JACKPOT. The bag marks only add to the mystigue or perhaps they are small dinosaur tracks?? I "heard" there were a hoard of these found in a gold mine in Northern Nevada in the early 1800's