The Lionel Erier Alcos AA units are vintage model trains from 1952, replicas of Alcos diesel locomotives. These O scale units come pre-built and ready to go, featuring a Bo-Bo wheel configuration and made of plastic material. With a classic design and light function, they are part of the Three-Rail System and are controlled with an analog control system. This collectible set is a great addition to any model railroad collection, representing the Erire corporate roadname and embodying the theme of transportation from the 1950s.