Northern Pacific diesel locomotive number 2506 in the engine facility at Auburn, Washington, on April 08, 1968. NP 2506 is a U25C built by General Electric in 1964. It is coupled to F-9B NP 7012B. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive,

Northern Pacific diesel locomotive number 2506 in the engine facility at Auburn, Washington, on April 08, 1968. NP 2506 is a U25C built by General Electric in 1964. The unit is coupled to F-9 NP 7012B. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight locomotive

Northern Pacific diesel locomotive number 2505 in the engine facility at Auburn, Washington, on March 21, 1967. NP 2505 is a U25C built by General Electric in 1964. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight locomotive

Northern Pacific diesel locomotive number 2505 in the engine facility at Auburn, Washington, in 1967. NP 2505 is a U25C built by General Electric in 1964. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight locomotive

Northern Pacific diesel locomotive number 2505 in the engine facility at Auburn, Washington, on May 26, 1967. NP 2505 is a U25C built by General Electric in 1964. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight locomotive

Northern Pacific diesel locomotive number 2503 in the engine facility at Auburn, Washington, on March 21, 1967. NP 2503 is a U25C built by General Electric in 1964. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight locomotive

Northern Pacific diesel locomotive number 2500 in the engine facility at Auburn, Washington, on March 17, 1970. NP 2500 is a U25C built by General Electric in 1964. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight locomotive

Northern Pacific diesel locomotive number 917 in a yard at Tacoma, Washington, on July 15, 1970. NP 917 is a RS-11 built by American Locomotive Company in 1960. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, road switcher

Northern Pacific diesel locomotive number 239 in the engine facility at Auburn, Washington, on December 29, 1970. NP 239 is a GP-9 built by Electro Motive Division of General Motors Company in 1955. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, road switcher

Northern Pacific diesel locomotive number 239 in the engine facility at Auburn, Washington, on September 14, 1970. NP 239 is a GP-9 built by Electro Motive Division of General Motors Company in 1955. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, road switcher