Hi Mike,
First let me say I've NEVER participated in a Round Robin, as I have very few traders.

Second, I don't THINK I've traded any of the chips I'm about to mention.

What drew my attention, in your post, is the White Cal-Neva chips with a black hot-stamp, and GREEN INK. I have 4-5 of those chips...all with green (though I thought it was crayon), and now I wonder if that was an extra cancellation??