This is a set of photos taken at the JNR (Japanese National Railways) Tadotsu Operation Center in 1980. It was included when I purchased a set of railway goods from a railway specialty store. Based on other materials, it seems that the photos were taken by someone affiliated with JNR. The date and time of the photos are written on the back. Almost all of the photos are of the DF50. There is some staining on the back. There is a sticky feeling, possibly due to tape residue on the back. Please understand that these items have been stored by an individual, and purchase accordingly.