These 50’ box cars with plug doors are painted brown with white logos & lettering. They were built in June 1956 by American Car & Foundry, serviced in August 1980, and run on Barber roller bearing trucks. These Class BX-186 cars were originally class RR-58 built in 1956 by AC&F; later they rebuilt by ATSF and renumbered into series 55273-55367.