Used in freight/passenger service. Has 73" drive wheels, weighs 867,000 pounds, and reached 110 mph. The 4460 pulled last steam-powered train on the SP in 1958. Southern Pacific #4460 is a beautiful streamlined locomotive with a 4-8-4 Northern Configuration. GS Class engine, where "GS" Stands for General Service. Southern Pacific #4460 is the only surviving GS-6 Class steam locomotive. It was built during World War II, but was never painted the famous Daylight paint scheme. Instead, it was painted black and silver, thus earning it the nicknames "War Baby" and "Black Daylight."