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 on November 1, 1982. 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 original green and orange scheme. A crew member is visible standing near the rear of the locomotive. Photograph by Russ Porter. Other subject classes: Locomotive-Diesel, Train-Passenger, People-Railroad Crew

Great Northern diesel locomotive 506 an Electro-Motive Division Type E7A, at Bellingham, Washington with passenger train; at F Street crossing; photograph sequence TRWahl0185, 0178, 0186. Other subject categories: Locomotive-Diesel, Train-Passenger

Great Northern diesel locomotive 506 an Electro-Motive Division Type E7A, at Bellingham, Washington heading north with train past Mount Baker Plywood. Other subject categories: Locomotive-Diesel, Industrial Buildings

Great Northern diesel locomotive 506 an Electro-Motive Division Type E7A, at Bellingham, Washington heading north with passenger train past Mount Baker Plywood; view is looking south down the main track rather than west across it. Other subject categories: Locomotive-Diesel

Great Northern diesel locomotive 506, a Electro-Motive Division Type E7A, at Bellingham, Washington leading southbound passenger train north of Squalicum Creek; Olympic Portland Cement Company dock in background. Other subject categories: Locomotive-Diesel, Train-Passenger, pier

Great Northern Diesel Locomotive 507 at Saint Paul, Minnesota, 1954, diesel locomotive number 507, an Electro-Motive Division type E-7. Other subject classes: Passenger train

Great Northern Diesel Locomotive 507, February 19, 1967, diesel locomotive number 507, an Electro-Motive Division type E-7,(leading the "Badger"). Other subject classes: Passenger train

Great Northern Diesel Locomotive 508 on May 1, 1980. 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 508, undated, original orange/green paint scheme. Other subject classes: Locomotive