The 1923 ARA standard design boxcar was brought forward by the mighty PRR who had many thousands of the type, classed X29 by the Pennsy. This design marked the transition from wood to steel in freight car construction. in the 1930’s, more than 50.000 of the X29’s and clones of other railroads have been constructed, making it the most common type of railroad car at the time. The much …
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