I don't know the answer but I do have a comment. The Paris jetons have a denomination on them (unlike regular roulette chips). Because of this, there is no risk to the casino of the chips leaving the table and coming back at a higher amount. At denominations of $5, $10, $20, $50 and higher, why would the casino mind these chips 'walking'? I'm sure the replacement cost to the casino is less than $2 each. Guaranteed profit, if you ask me.