Great Northern Railway 83 at Seattle, Washington in 1970. The locomotive is a General Motors Electro Motive Division Model SW1. Other subject classes: Locomotive, SW-1

Great Northern Railway 81 at Seattle, Washington in 1970. The locomotive is an General Motors Electro Motive Division Model SW1. Other subject classes: Locomotive, SW-1

Great Northern Railway 81 at Seattle, Washington. The locomotive is a General Motors Electro Motive Division Model SW1. Rear view detail photo. Other subject classes: Locomotive, SW-1

Great Northern Railway 81 at Seattle, Washington. The locomotive is a General Motors Electro Motive Division Model SW1. Front end detail photo. Other subject classes: Locomotive, SW-1

Great Northern Railway 77 at Seattle, Washington in 1969. The locomotive is an General Motors Electro Motive Division Model SW1. Other subject classes: Locomotive, SW-1

Great Northern Railway 733 at Seattle, Washington. The locomotive is a General Motors Electro Motive Division Model GP-9. Other subject classes: Locomotive, GP-9

Great Northern Railway 726 at Seattle, Washington. The locomotive is a General Motors Electro Motive Division Model GP-9. Big Sky Blue paint scheme. Other subject classes: Locomotive, GP-9

Great Northern Railway 723 at Seattle, Washington. The locomotive is a General Motors Electro Motive Division Model GP-9. Other subject classes: Locomotive, GP-9

Great Northern Railway 712 at Seattle, Washington. The locomotive is a General Motors Electro Motive Division Model GP-9. Big Sky Blue paint scheme. Other subject classes: Locomotive, GP-9

Great Northern Railway 711 at Seattle, Washington. The locomotive is a General Motors Electro Motive Division Model GP-9. Other subject classes: Locomotive, GP-9