This was an end of a era, at least for the Santa Fe Railroad. It was the last run of a U.S. Post Office mail-sorting car, leaving Amarillo, Texas in the late afternoon of Oct. 14, 1964. http://gallery.leica-users.org/v/Bill1941/RETROSPECT/Last+Sante+Fe+Railroad+U_S_+Postal+Car_+Amarillo_+Texas_+October+14_+1964+___++00961.jpg.html –Bill