Builders photo of SP&S 4-6-0 steam locomotive Number 150, Class D-2, at Baldwin Locomotive Works in Philadephia, Pennsylvania, Photo by Baldwin Locomotive Works.

SP&S 4-6-0 steam locomotive Number 150, Class D-2, on ready track at Portland, Oregon on April 2, 1922. From J. Foster Adams Collection, Rocky Mountain Railroad Club.

SP&S 4-6-0 steam locomotive Number 150, Class D-2, on the service tracks at Portland, Oregon on December 21, 1947.

SP&S 4-6-0 steam locomotive Number 150, Class D-2, at Portland, Oregon on July 27, 1936.

SP&S 4-6-0 steam locomotive Number 150, Class D-2, at Portland, Oregon on June 3, 1941.

SP&S 4-6-0 steam locomotive Number 150, Class D-2, with a passenger train at Portland, Oregon on October 3, 1931. Photo Otto Perry.

SP&S 4-6-0 steam locomotive Number 150, Class D-2, at the turntable at Portland, Oregon. Photo by William Monypeny.

SP&S 4-6-0 steam locomotive Number 150, Class D-2, taking on water at Portland, Oregon.

SP&S 4-6-0 steam locomotive Number 150, Class D-2, at Portland, Oregon.

SP&S 4-6-0 steam locomotive Number 150, Class D-2, at on the service tracks at Portland, Oregon. Photo by H.L. Arey.