BAR's State of Maine cars went everywhere in the USA during the 1950's, (even down South through Virginia!) especially when moving the potato crop to market. The signature BAR State of Maine red white and blue car was a 40' insulated, ventilated, heated plug-door box car. This one was made from a 1970's Atlas unpainted kit, to which I added a Preco charcoal heater and the often missed side vent panels. My references were from the 1953 edition of Car Builders' Cyclopedia.
S. Islander