Freight Car Prototypes
Modified 1937 AAR Box Car

The Modified 1937 AAR box car continued the standardization wave that was ushered in by the 1937 AAR box car. While not built in the same numbers as the original design, it was nonetheless constructed in vast quantities with a number of roads receiving in excess of 5,000 units.

The table of prototypes is a living document. If you see a mistake or an omission or you can help to fill in a blank, please let us know (

Table of as-built Modified 1937 AAR Box Car Prototypes (Letter - 8.5 x 11) (Tabloid - 11 x 17) - Updated 2/20/2017 (Adobe Acrobat PDF file, compiled by Ed Hawkins)