Amtrak diesel locomotive 627, an EMD SDP40F at Oakland, California in October 1979. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 627, an EMD SDP40F at Oakland, California in October 1979. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 627 at Oakland, California in 1979. Amtrak 627 leads train number 5 during a station stop at Oakland in 1979. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 293 leads train number 11 at Oakland, California on March 31, 1980. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 293, an F40PHR EMD SN 777063-14 at Oakland, California on March 31, 1980. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train