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 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 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 4008 at Easton, Washington, on June 21, 1943. Number 4008 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4008 posed for a builder's photo in April 1913. Number 4008 is a class Z-3 built by Alco-Schenectady in 1913. Photo by Alco-Schenectady, J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4008 at Tacoma, Washington, on July 13, 1938. Number 4008, a class Z-3 built by Alco-Schenectady in 1913, is shown during a break-in run in Half-Moon yard in Tacoma. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4009 at Easton, Washington, in 1944. Number 4009 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 4009 at Yakima, Washington, on July 28, 1935. Number 4009, a class Z-3 built by Alco-Schenectady in 1913, arrives at the Yakima coal dock with an extra-east freight train. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, freight train, coal dock

Northern Pacific steam locomotive 4009, circa 1936. Number 4009 is a class Z-3 built by Alco-Schenectady in 1913. J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4010 waits to pick up its next train at Easton, Washington in 1944. Number 4010 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo