Northern Pacific diesel locomotive number 175 in a yard at Tacoma, Washington, on July 1970. NP 175 is a SW 1200 built by Electro Motive Division of General Motors Company in 1958. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 175 in a yard at Tacoma, Washington, on July 02, 1970. NP 175 is a SW 1200 built by Electro Motive Division of General Motors Company in 1958. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 175 at Eddystone, Pennsylvania. NP 175 is an AS 415 built by Baldwin in 1948. The NP renumbered this unit to 500 in 1950. A replacement Electro Motive Division of General Motors Company engine was installed in this unit in 1959. Photo by Baldwin Locomotive Works, J.M. Fredrickson collection. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 169 in the engine facility at Auburn, Washington, on July 10, 1946. NP 169 is a VO 1000 built by Baldwin in 1945. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 168 in a yard at Tacoma, Washington, circa 1949. NP 168 is a VO 1000 built by Baldwin in 1945. This unit was renumbered to 421 in 1950. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 163 in a yard at Tacoma, Washington, on July 11, 1946. First NP 163 is a VO 1000 built by Baldwin in 1945 and renumbered to 416 in 1950. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 161 in the engine facility at Auburn, Washington. NP 161, an Electro Motive Division of General Motors Company SW1200 diesel, was built in July 1957. It was the second NP switcher number 161, replacing a Baldwin VO-1000 that was renumbered to 412. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 160 at the roundhouse in Tacoma, Washington, on July 11, 1946. NP 160 is a VO 1000 built by Baldwin in 1945. This unit was renumbered to 413 in 1950. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

Northern Pacific diesel locomotive number 159 in the engine facility at Tacoma, Washington, on May 17, 1970. NP 159 is a SW 1200 built by Electro Motive Division of General Motors Company in 1957. This was the second unit owned by the NP to be numbered 159. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive

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