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N 126-0301 4-8-4 GS-4 Southern Pacific Postwar Passenger Scheme 4453 Call  
N 126-0302 4-8-4 GS-4 Southern Pacific Postwar Passenger Scheme 4449 Call  
N 126-0303 4-8-4 GS-4 Southern Pacific Wartime Black "Lines" 4431 Call  
N 126-0304 4-8-4 GS-4 Southern Pacific Wartime Black "Lines" 4438 Call  
N 126-0305 4-8-4 GS-4 Southern Pacific Postwar Black "Large Lettering" 4433 Call  
N 126-0306 4-8-4 GS-4 Southern Pacific Postwar Black "Large Lettering" 4445 Call  
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The GS-4 runs on four massive 80?drivers, 300lbs psi boiler pressure, and puts out a roaring 5,500 horsepower at 55mph, with a maximum speed of 110 mph. The large drivers gave the locomotive a high top speed by sacrificing low-speed torque; the telling mark of a steam engine built for passenger service instead of freight. The GS-4 was built for the Southern Pacific Railroad by the Lima Locomotive Works and delivered in the early 1940’s for the SP’s premier passenger trains, finding its way to the Daylight series of name trains. One of the more unique specifications for the GS-4 by the SP was its Mars light, a necessity with the large amount of grade crossings and fog present on the West Coast. The Mars light, like ditch lights on modern locomotives, was utilized as a warning for grade crossings that a high speed train was approaching, its shifting light patterns serving as an eye catcher in foggy conditions.