Walthers 910-46524 HO Scale 50' AAR Single Door Boxcar Northern Pacific NP 1238 Roadname_St. Mary's West SMW The open lug design features

The open lug design features alternating small and large lugs to ensure ultimate traction on unpredictable terrain

and no superheater damper on the smokebox

Rotatable roof-mounted weapon station

Lionel 6-17406 Gondola with Coil Covers Pennsylvania Railroad PRR - NOS

New York Puzzle Company Sidewalk Connoisseurs

Walthers 910-46524 HO Scale 50' AAR Single Door Boxcar Northern Pacific NP 1238 Roadname_St. Mary's West SMW The open lug design featuresWalthers 910 46524 HO Scale 50' AAR Single Door Boxcar Northern Pacific NP 1238 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.