Burlington Northern diesel locomotive 752, formerly Northern Pacific 6019A, at Auburn, Washington in 1971. Number 752 is an F7A built by General Motors Electro Motive Division (EMD), builder's number 15672. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 752, formerly Northern Pacific 6019A, at Auburn, Washington, circa 1971. Number 752 is an F7A built by General Motors Electro Motive Division (EMD), builder's number 15672. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 753, formerly Northern Pacific 6019B, at Auburn, Washington, on May 19, 1971. Number 753 is an F7B built by General Motors Electro Motive Division (EMD), builder's number 15676. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 753, formerly Northern Pacific 6019B, at Auburn, Washington in 1979. Number 753 is an F7B built by General Motors Electro Motive Division (EMD), builder's number 15676. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 757, formerly Northern Pacific 6020B, at Auburn, Washington, on March 15, 1971. Number 757 is an F7B built by General Motors Electro Motive Division (EMD), builder's number 15678. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight yard.

Burlington Northern diesel locomotive 758, formerly Northern Pacific 6020D, at Auburn, Washington, on March 01, 1971. Number 758 is an F7A built by General Motors Electro Motive Division (EMD), builder's number 15675. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, roundhouse.

Burlington Northern diesel locomotive 758, formerly Northern Pacific 6020D, at Auburn, Washington, on September 30, 1975. Number 758 is an F7A built by General Motors Electro Motive Division (EMD), builder's number 15675. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, locomotive facility.

Burlington Northern diesel locomotive 761, formerly Northern Pacific 6012C, at Auburn, Washington, on March 01, 1971. Number 761 is an F7B built by General Motors Electro Motive Division (EMD), builder's number 10931. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, locomotive facility.

Burlington Northern diesel locomotive 761, formerly Northern Pacific 6012C, at Auburn, Washington, on February 17, 1971. Number 761 is an F7B built by General Motors Electro Motive Division (EMD), builder's number 10931. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 763, formerly Northern Pacific 6011C/6000C, at Auburn, Washington, circa 1971. Number 763 is an F3B built by General Motors Electro Motive Division (EMD), builder's number 3875. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.