These are from three Flamingo Casinos, different towns Reno Laughlin and Las Vegas, all with the same serial number 56. I Was fortunate to acquire such a set from a friend of mine who obtained them from the manufacturer years ago before they were released. It would be next to impossible to put three sets toghter with all the same number. Very Happy to have a set such as this. Front and backs shown. Thanks to all my fellow chippers helping build my collection. TFL D MR. Sahara.