Northern Pacific diesel locomotive number 159 in the engine facility at Auburn, Washington, circa 1949. NP 159 is a VO 1000 built by Baldwin in 1945 and was renumbered to 412 in 1950. A 1000 hp engine was installed in this unit in 1957 by EMD. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 159 in a yard the Auburn, Washington, circa 1949. NP 159 is a VO 1000 built by Baldwin in 1945. This unit was renumbered to 412 in 1950 and rebuilt by Electro Motive Division of General Motors Company with a new 1000 hp engine in 1957. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 155 at the engine facility at Auburn, Washington, circa 1946. First NP 155 is a RS-1 built by American Locomotive Company in 1945. The unit was renumbered to 800 in 1950. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 145 at the roundhouse at Auburn, Washington. NP 145 is a SW 1200 built by Electro Motive Division of General Motors Company 1956. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 126 in the engine facility at Auburn, Washington, on October 01, 1969. NP 126 is a SW 1200 built by Electro Motive Division of General Motors Company in 1955. This is the second unit numbered 126 for the NP. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 120 in the engine facility at Auburn, Washington, circa 1949. NP 120 is a VO 1000 built by Baldwin in 1944 and renumbered to number 405 in 1950. Sister NP 112 is in the background. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 120 at the roundhouse at Auburn, Washington, circa 1949. NP 120, a VO 1000, was built by Baldwin in 1944 and renumbered to number 405 in 1950. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 112 in the engine facility at Auburn, Washington, circa 1949. NP 112 is a VO 1000 built by Baldwin in 1942. This unit was renumbered to number 403 in 1950 and rebuilt to 900 HP by Electro Motive Division of General Motors Company in 1959. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 100 in the engine facility at Auburn, Washington, on May 05, 1970. This unit was the first diesel purchased by the NP in 1938 as a NW-1. It was rebuilt as a SW-900 (900 HP) by Electro Motive Division of General Motors Company in 1956. The unit survived as BN number 100 and was sold in 1984. It is parked next to NP 6010A, an F-7A and NP 132, a SW 1200. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive,

Northern Pacific 6020 leaves the yard at Auburn, Washington, with train number 675 in 1953. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.