Walthers 910-46525 HO Scale 50' AAR Single Door Boxcar Pennsylvania PRR 72680 Switch Machine Athearn 1215 HO Scale 53'

Athearn 1215 HO Scale 53' Container Chassis JB Hunt JBHZ

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Walthers 910-46525 HO Scale 50' AAR Single Door Boxcar Pennsylvania PRR 72680 Switch Machine Athearn 1215 HO Scale 53'Walthers 910 46525 HO Scale 50' AAR Single Door Boxcar Pennsylvania PRR 72680 The Association of American Railroads had been trying to set design standards for freight cars starting in the early 20th century. The early designs were not widely embraced. Many railroads preferred their own designs. By the time the 1937 AAR boxcar was introduced, this had begun to change as each new design standard provided higher capacity, lighter, more durable cars.