Northern Pacific steam locomotive 4007 at Easton, Washington, in 1944. Number 4007 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4006 fresh from the shops at South Tacoma, Washington, circa 1938. Number 4006, a class Z-3 built by Alco-Schenectady in 1913, starts a break in run in South Tacoma after release from the shops. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4006 at Martin, Washington, in 1944. Number 4006 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4006 at Easton, Washington, on September 18, 1938. Number 4006, a class Z-3 built by Alco-Schenectady in 1913, is parked at the water column. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, water column

Northern Pacific steam locomotive 4005 at Tacoma, Washington, on June 22, 1934. Number 4005, a class Z-3 built by Alco-Schenectady in 1913, is parked at the Tacoma engine facility after release from the shops. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4005 at Tacoma, Washington, on June 22, 1934. Number 4005, a class Z-3 built by Alco-Schenectady in 1913, is parked at the Tacoma engine facility after release from the shops. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roundhouse

Northern Pacific steam locomotive 4005 at Easton, Washington, on April 08, 1943. Number 4005 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4005 at Easton, Washington, on April 08, 1943. Number 4005 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4005 at Auburn, Washington, in 1942. Number 4005 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4004 at Stampede, Washington, circa 1928. Number 4004 is a class Z-2 built by Baldwin in 1910. Photo by Alma Floberg, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo