Metra AMFLEET 4-Car Passenger Set 20-6520 is a vintage O scale model train set that was released in 1988. The set is notable for being a piece of model train history and is not an authentic set of equipment used by the actual Metra commuter rail service in Chicago. All sets were known for disintegrating/crumbling couplers on all 4 cars. The cars are like new, the original box shows signs of shelf wear and is in poor condition. Please ask any questions prior to purchasing.