I posted this on the string below but since this one seems to be current, here is what I found out.

According to Ralph Pollacks book, this inlay is definately from the Casablanca in Aruba.
According to the book this is a "Credit" chip since it is hot pink and the regular issue is red. Now the same inlay is used also for the $25 chip, but it should have been green with 4 sets of 3 inserts in Yellow, Pink, and Black. So, It is not a fantasy chip but may possibally Be a Sample chip or could be an error. Either way, I want one for my own collection.