I found a case, full of "cheatin dice" with the same color/design case and felt padding in SE Ohio. I just wonder if that was a standard sales item that someone made. No names anywhere, but the dice are all sorts of colors and sizes.

I also wonder if they were bought by grifters as well as the house, for manipulation of the outcome?

Some are 2-4-6-2-4-6. Another is 1-3-5-1-3-5. But the funniest are dice that are all sides 5 or 6. You would think someone would spot that?