Amtrak diesel locomotive 536, an EMD SDP40F at Seattle, Washington in August 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 534 at Seattle, Washington, circa 1978. Train number 11 at King Street Station. Seattle skyline in the background. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 534, an EMD SDP40F at King Street Station in Seattle, Washington on August 22, 1973. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 534 at Seattle, Washington in July 1975. Amtrak 534 leads train 13 at King Street Station in Seattle in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 533, an EMD SDP40F at Seattle, Washington, circa 1980. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 533 at Seattle, Washington in 1979. Train number 11 at King Street Station with the Seattle skyline in the background with the King Dome to the left. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 531, an EMD SDP40F SN 72694-32 at King Street Station in Seattle, Washington in August 1974. The King Dome construction is visible in this photograph. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 531, an EMD SDP40F SN 72694-32 at King Street Station in Seattle, Washington in August 1974. The King Dome construction is visible in this photograph. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 531, an EMD SDP40F SN 72694-32 at King Street Station in Seattle, Washington in August 1974. The King Dome construction is visible in this photograph. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 500, an E9A SN 28668 at Seattle, Washington on August 4, 1980. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train