Boxcar
PRR #538164
40' wood boxcar, X23 Class. This single-sheathed car design utilized Warren-truss
bracing and a fish belly underframe. These features, combined with its low roof height,
gave the X23 a unique appearance which stood out in any train. PRR had over 7,000 X23s
built between 1912 and 1914. They also had another 3,500 nearly identical looking R7
reefers built up to 1915. The X23 boxcars served the PRR and its subsidiary railroads
very well. Over the years various improvements were made including replacing the original
roof with a lap-seam roof, 2D-F8 cast trucks replacing the original arch-bar trucks,
KD-Brakes being upgraded with AB-brakes, and the 3-panel Creco door being replaced with
a Youngstown corrugated door. The fleet of X23s continued to soldier on into World War 2
with over 90% of the fleet still in service by January 1945. However, their hard use
during the war years combined with their age meant that most cars were retired from regular
service by the late 1950s. However, many X23s were retained for work equipment service and
lasted well into the 1970s in this role.