40' PRR X23 Box Car

Prototype Information

The Pennsylvania Railroad introduced its first 40-foot boxcar, the X23, in 1912. Built with Warren-truss side bracing, a fishbelly underframe, and a low roof, the car had a distinct look that stood out in any train. Between 1912 and 1914, the PRR and its subsidiaries rostered more than 7,000 X23s.

Over time, the railroad modernized the cars with lap-seam roofs, 2D-F8 cast trucks in place of arch-bars, AB brakes replacing KD gear, and Youngstown corrugated doors replacing the original Creco design. The X23 fleet held up remarkably well—by 1945, more than 90% were still running.

Heavy wartime use and advancing age pushed most of the cars out of revenue service by the late 1950s. Even so, dozens lived on in maintenance-of-way service, where they continued working well into the 1970s.