Southern Railway Ps-4 Pacific No. 1404 was part of the railroad's second order for locomotives of this class, constructed in 1926 by American Locomotive Company's Richmond Works. One of North America' most celebrated steam engine types, the Southern's Ps-4s were painted in a distinctive green-and-gold scheme that was eventually applied to many of the Southern's passenger engines. Carrying 200 p.s.i. of boiler pressure per square inch, they had drivers of 73 inches in diameter and cylinder dimensions of 27x28 inches. They weighed 276,000 pounds, and produced 47,535 pounds of tractive effort.

Shelby Lowe captured No. 1404 in color in Washington, D.C. in 1941 (note the Pennsylvania Railroad GG1 electric unit in the background), and the image came to us through Tom Rock of T.D.R. Productions. No. 1401 of the Ps-4 class was preserved, and is displayed today at the Smithsonian Institution in Washington. All other members of the class were retired and scrapped by the end of 1953.