The Vintage Lionel Postwar O Gauge Train Set 218 Santa Fe Alco Diesel is a classic model train set that includes a replica of the Santa Fe diesel locomotive. This set is in O gauge, making it suitable for collectors and hobbyists who enjoy model railroads. The Lionel brand is known for its quality and attention to detail, ensuring that this train set is both a nostalgic piece and a functional addition to any model railroad collection. This was a promotional configuration for sears with only one single power unit.