The reverse side of the photograph indicates it is from the collection of Harold K. Vollrath, located at 8938 Maple Drive, Shawnee-Mission, Kans., with a note stating "Reprints are Available.". Handwritten annotations on the back provide key details: "Mp 529-530" identifying the locomotives, "EmD 47" likely referencing an EMD E7 or F7 unit and the year 1947, and "Kingsville Tex 4-48" pinpointing the location as Kingsville, Texas, and the date the photograph was taken as April 1948.
