called a Chipco sample or Chipco over-print.

It is usually very difficult to tell which design is the over-print and which is the original print, but the general idea is that the chip was sent through the printing process twice in an effort to cancel the first impression, or to produce a sample that displays graphic capability and chip weight/texture to prospective buyers, without having to show an actual chip.

Here are some additional examples from my collection, as some of use like to acquire these over-prints.

(Frontier Casino, Calgary (roulette) over-prints of Caribe Hilton, Puerto Rico (rack) chips)

(Caribe Hilton courtesy of the Caribbean Chip Guide)

(Frontier Casino roulettes courtesy of the 's MoGH ChipGuide)

Jim