First of all, this chip has been listed as both a $5 chip from the Curacao Hilton (Curacao) and from the Caribe Hilton (Puerto Rico). Second, my chip has a second stamp, which, like Pete's, has no foil:

Looking closely, the understamp is from the Village Club in Chelsea and is a 5 pound denomination:

Still hoping to get a 5 pound Village Club chip in my collection some day, but they are apparently quite hard to find (possibly the "r" word).

Michael Siskin