I don't get a lot of downtime to do chipping, but this hurricane is making for a long weekend indoors, so I've been doing more.

Your green chip is the only denomination I've seen from the Cairo club. They were unknown for awhile, but I found a few mixed in with some other Cairo chips that were from a raid. Since ALL chips were Cairo, I think putting a Club 18 there is a good bet. Also, the name Club 18, although probably not unique, is at least rare and Cairo did have one.

The green TK chip isn't common, but it's also not scarce. I found around half dozen and before that I already had one in my UFC boxes. My guess is they are probably out there in sufficient numbers to satisfy most collectors.