Introduced by Pullman Standard in the mid-1960s, these mini XL hy-cubes were designed for the carriage of appliances. The height allowed the appliances to be stacked three high in the cars. The cars were considered novel at the time and a number of large rail lines from the West and Midwest acquired small fleets.
The upper white band was marked for excessive height. Long ladders and roof walks were eliminated for safety by railroad rules around that time.
I really like these cars !