After searching for so long I finally found a $1 chip from the Hotel Gran Bahia in San Juan, Puerto Rico. Archie "Black's Catalog" of Puerto Rico Casino Chips shows many varieties of $1 chips from this casino, but they are all manufacturer cancelled, leading me to believe that they were just samples and they never actually used $1 chips in this casino. But lo and behold I finally found one and it is NOT CANCELLED. It is the first $1 chip I have seen from this casino, ever. Also notice the before and after pictures.

Before - Side 1 and 2

After - Side 1 and 2

See all the chips from the Hotel Gran Bahia on the Caribbean ChipGuide (click below)
http://www.caribbeanchipguide.com/chip2.php?primarykey=probah&sort=type