Williams Electric Trains 5 Car Gray Madison Passenger Set Union Pacific O gauge. This set looks like it has never been run. There is no box for this set. Please view the p. Ictures for more details and feel free to ask any questions. This train is from a gentleman’s very large collection. Most items were bought new and never used as he never had a layout. With that being said, most of the engines from the collection could either use a new battery or the existing battery charged.