Great Northern Diesel Locomotive 506 at Saint Paul, Minnesota on August 13, 1968. The photograph shows an Electro-Motive Division Type E-7, Great Northern Class E-7. The locomotive is painted in the simplified green and orange scheme. Photograph by Karl Henkels. Other subject classes: Locomotive-Diesel

Great Northern Diesel Locomotive 506 at Saint Paul, Minnesota, 1968, an Electro-Motive Division type E-7 in the simplified orange/green paint scheme . Other subject classes: Locomotive

Great Northern Diesel Locomotive 506 at Saint Paul, Minnesota on July 29, 1963. The photograph shows passenger train with an Electro-Motive Division Type E-7, Great Northern Class E-7 locomotive. The locomotive is painted in the simplified green and orange scheme. Other subject classes: Locomotive-Diesel

Great Northern diesel locomotive 504 leads the eastbound Empire Builder near Saint Paul, Minnesota. Other subject categories: Passenger

Great Northern Diesel Locomotive 503 at Saint Paul, Minnesota, 1968, an Electro-Motive Division type E-7 in the simplified orange/green paint scheme (leading a train). Other subject classes: Locomotive

Great Northern Diesel Locomotive 502 at Saint Paul, Minnesota on August 27, 1967. The photograph shows a passenger train with an Electro-Motive Division Type E-7, Great Northern Class E-7 locomotive. The locomotive is painted in the simplified green and orange scheme. Other subject classes: Locomotive-Diesel, Train-Passenger

Great Northern Diesel Locomotive 502 at Saint Paul, Minnesota on July 29, 1963. The photograph shows an Electro-Motive Division Type E-7, Great Northern Class E-7. The locomotive is painted in the original green and orange scheme. Other subject classes: Locomotive-Diesel

Great Northern Diesel Locomotive 410 at Saint Paul, Minnesota, 1968, simplified orange/green paint scheme. Other subject classes: Locomotive

Great Northern Diesel Locomotive 373B at Saint Paul, Minnesota on July 24, 1967. The photograph shows an Electro-Motive Division Type F-7, Great Northern Class F-3-7-B. The locomotive is painted in the simplified green and orange scheme. Photograph by Owen Leander. Other subject classes: Locomotive-Diesel

Great Northern Diesel Locomotive 371B at Saint Paul, Minnesota on July 24, 1967. The photograph shows an Electro-Motive Division Type F-7, Great Northern Class F-3-7-B. The locomotive is painted in the simplified green and orange scheme. Photograph by Owen Leander. Other subject classes: Locomotive-Diesel