Here's a photo from Mario Puzo's book Inside Las Vegas that shows these chips in the Nevada mold. No information in the caption other than these guys are student dealers. Copyright of the book and photos is '76 and '77. Photog credits acknowlege "Micheal Gaughan, co-owner of the Royal Inn Casino".

Lots of great photos in this book obviously written by somebody with a gambling jones locked in a Vegas hotel room with a typewriter and several gallons of liquor. Godfather guy must have had some markers to take care of?