Ok, here’s my two cents. Don is correct, Lionel collectors sometimes call these “plug” door boxcars, but they are simply two door boxcars whose doors do not open. Below are the only two I have. I won the JC Penny car as a door prize at a local show in Hawley. The EL car I bought to run around my Christmas tree. The ART reefer represents a true “ plug” door, where on the prototype slides closed, and then can be sealed shut with the locking mechanism on the door to keep the inside cool for perishables. The ART reefer is about the size of a 6464 boxcar and is Industrial Rail.
