Southern Pacific SD7 Part 1
The Prototype After a successful demonstration, the Southern Pacific ordered 15 model SD7 locomotives from the Electromotive Division (EMD) of General Motors (GM) on 4. April 1952. These featured a single 1,200 gal. fuel tank, Mars dual sealed beam headlights, and dynamic brakes. As delivered, these units were painted in the Road Switcher variation of what’s become known as the “Tiger Stripe” paint scheme. These were later repainted in “Black Widow” and had Mars signal…