This 1.00 chip is the same on both sides, I picked the chip up from the casino in early 1980's. The chip is in good condition, but the 1.00 numeral is missing on both sides. I've had the chip stored in the CASINO CHIPS BINDER just found the binder in a box of other collectible items. N1966s in the chip guide. Any ideas if an error or how the denomination disappeared on both sides, with no trace of the orange 1, but other colors are excellent.? Need help solving this mystery.