There were several monopoly with dice games in the 550, but the one that just had the topbox with the gameboard that you would go around based on a dice roll was call Once Around. A lot of us tried to get a complete game, but for some reason everybody who got a hold of the special topbox, was missing the eprom from it, the famous XU10 eprom. I don't know if anybody got one of those working. I know there were several people who got a hold of the topbox, but could never get it going. Chairman of the board, I'm not sure it had the physical dice that spun around. I have that gameset for my 550, and the dice are rolled into the top box graphics if I remember correctly.