Rich,

The Casino de Puerto Rico predated legal gambling in Puerto Rico. There was illegal gaming in Puerto Rico, but they were underground. The Casino de Puerto Rico was not an underground establishment. I think that it is likely that Casino de Puerto Rico was a non-gambling type casino that was more of a recreational establishment, usually near the water, that were common in the U.S. in the days before legal gambling. So, I think that it is likely that these chips were not from the Casino de Puerto Rico.