Milwaukee Road class F7
The F7s are major contenders for the fastest steam locomotives ever built, as they ran at over daily. One run in January 1941 recorded by a reporter for "Trains" magazine saw achieved twice—in the midst of a heavy snowstorm. Baron Gérard Vuillet, a French railroading expert, once recorded a run between Chicago and Milwaukee where the locomotive reached and sustained an average for . However, the British locomotive LNER Class A4 4468 "Mallard" is officially accepted to be the world's fastest, with a run recorded at but authenticated at 126 mph in 1938.
Baldwin Locomotive Works
There are many Baldwin built steam locomotives currently operating in the United States, Canada, and several other countries around the world. Out of all the Baldwin built steam locomotives that are operational or have operated in recent years, the most recognized locomotives are Reading 2101, Southern Railway 4501, Frisco 1522, Nickel Plate 587, Southern Pacific 2467, Southern Pacific 2472, Spokane, Portland and Seattle 700, the oldest surviving 4-8-4 Northern type steam locomotive, Santa Fe 3751, and the last domestic steam locomotive Baldwin built, Chesapeake and Ohio 1309.