SP 5730 express 40' box car 1950 color image
Photographed in the city of Oakland, CA in 1950. Southern Pacific passenger green Railway Express Agency 40' Southern Pacific box car with alternating centered riveting. A scan from a Kodachrome slide I purchased 3-4 years ago.
Notice the poling pocket 3/4 improved Dreadnaught end. I have dozens of these ends remaining from Intermountain.