These paint schemes represent the major variations of the locomotive's appearance over the course of it's operational life.
Colors are approximate.
Numbers on pictured units are not necessarily approprate. Developed by the PRR, this scheme predates the Loewy design. A similar design was used on the R1 experimental. Dark Green, Wide 5 gold pinstripes and gold sans-serif Futura lettering, small number keystone 4800 only, through at least 1937 First to be based on the Loewy desing, but would later be refined on production units. The scheme as Loewy envisioned it.