I agree that all of the chips posted as "Generic Roulette Chips" are probably Burt Co. chips. The chips with that specific "ROULETTE" mold with the two dots in between the words, were only made by the Burt, ASM, and Classic Poker Chips, in very small quantities. The Paulson ROULETTE mold is different.

I just posted under Roy Klein's original post, some ways in which Burt and USPC plain mold chips can be distinguished.