The so-called Northeastern Design Caboose was one of the first mass-produced all-steel construction cabooses. Originally designed by the Reading Company in the early 1920s, it was based in a proposed USRA design car, although the USRA design called for wood sheathing. The Reading built 285 cars, spread through several classes. The earliest cars had solid underframes, but later cars were equipped with Duryea cushion underframes.

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