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 in 1970. The locomotive is an General Motors Electro Motive Division Model SW1. Other subject classes: Locomotive, SW-1

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 98 at Seattle, Washington. The locomotive is a General Motors Electro Motive Division SW8. Other subject classes: Locomotive, SW-2

Great Northern Railway 98 at Seattle, Washington. The locomotive is an General Motors Electro Motive Division SW8. Other subject classes: Locomotive, SW-2

Great Northern Railway 98 at Seattle, Washington in 1962. The locomotive is a General Motors Electro Motive Division SW8. Other subject classes: Locomotive, SW-2

Great Northern Railway 99 at Seattle, Washington in 1969. The locomotive is an General Motors Electro Motive Division SW8. Other subject classes: Locomotive, SW-2