I found these three colorful Chipco samples last week. The edge markings would indicate a stacking set; probably six total, one for each letter of CHIPCO. These are C, P, and O. Anyone have the H, I, and C?

The reverse of each is the Chipco ad with the slogan "Casino Currency Security Systems".

I'd like to trade for the missing 3, or would take a complete set.

DonL