For the increased demands in freight traffic after the end of the war, a total of 510 freight locomotives were made by Škoda, which had the same boiler as the 4-8-2 locomotives of the class 475.1. All the modern achievements of steam locomotive engineering were used, such as a boiler pressure of 18 bars, Kylchap blast pipe, stoker, roller bearings and more. The result was a locomotive with a low axle load that was still able to pull freight trains weighing 3,000 tonnes in flat country tests. In practice, two locomotives pulled coal trains weighing up to 4,000 tonnes and they sometimes had to assist in front of express trains in the mountains. They were also used in neighboring countries and in 1983 were the last regular steam locomotives operating in Czechoslovakia. 