Very interesting Don - we will have to see what they are used for ??? I have lobbied for years for the Casinos in the US to use denominated roulette chips - like they used to use in Puerto Rico.
If the chips were denominated - we would not have the perils or stigma of harvesting, as you would be able to remove the chips from the tables and take them to the cashier's cage and cash them in just like regular chips - (or just take them home).
This is what you used to be able to do with the MGM and Paris jetons.
Take care,
Jerry