It always made sense to me that these two roulette chips were from the Casino de Puerto Rico. However, I never found proof. Although I don't know for sure, I believe these are the only two known (in any color).

I was paging through the Chipguide and saw the proof in a match book. Here is another match book recently on ebay. Interestingly enough, the only reason I have these chips is that when one was on ebay (12 to 15 years ago), no one realized that the distributor's name was mispelled and that many times, when a chip is sent to the "NY office", it is actually winds up in the Caribbean (or South America). I believe the other chip was sold to me as an unknown ---whew!