In 1950, Bangor & Aroostook commissioned Magor Car Company to build 300 insulated heated plug-door boxcars for potato service. An additional 150 cars were ordered from Pacific Car & Foundry in 1953. The cars were equipped with ventilators and charcoal heaters. New Haven piggybacked an order of 100 cars with the PC&F lot and factory-decorated its cars in the State of Maine scheme to save money on the purchase. The cars carried potatos in the winter and paper products in the summer.
