For those who collect poker chips with advertising, here is one I haven't seen before. Appears to have been used at a trade show where Sylvania, the electronics firm, was operating a roulette wheel to attract people to their booth. They are in 4 colors. I got mine from Howdy Herz and I think he has more of them.

Not in Seymour's book, but may not meet his criteria for an "antique" poker chip.