Amtrak diesel locomotive 551, an EMD SDP40F at a station stop in Centralia, Washington on May 14, 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 346 at Centralia, Washington on May 13, 1975. Amtrak 346 leads train number 797 at Centralia in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 346 at Centralia, Washington on May 13, 1975. Amtrak 346 leads train number 795 at Centralia in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train