This 60’ box car with double plug doors is painted Great Northern’s Glacier Green with white lettering and reflectors, and marked with the black, white and red “Rocky” logo. It was built by American Car & Foundry in November 1963, one of 50 cars within the series 139000-139049. It runs the Northwest District on 100-ton Barber Roller Bearing trucks with 36” wheels. These were the only 60’-9” double-door series owned by the GN. In the early 1960s Ford Motor Company prodded the railcar manufacturers to design a fleet to meet changing conditions in the automotive industry. One solution was the 60’ double plug door box car designed for transporting high-density components, such as castings and transmission assemblies. This design marked a revolution in railcar development.