Thomas, they had a wizard of oz theme going at the MGM, not all that familiar with it but I am pretty sure this was going to be a chip for that event and this is a Prototype chip.Maybe someone else has a better record or knowledge of the event and chip. I have always liked it and also I would like to learn more of the Wizard of Oz event that took place there. There's a Chipguide pic in odds and ends of this chip in the MGM grand theme. Torrey