Rendering shown for representation.

These boxcars were a part of Southern Pacific's high-volume "Overnight" service that ran overnight like the name suggests. Originally in a distinctive black
color scheme, it was changed to a silver scheme in 1956. Southern Pacific was a Class 1 railroad from 1865 until 1996, when it was absorbed by Union Pacific
after falling on hard times financially in the 1970s and 1980s.