The DRG Class 86 was a standard (see Einheitsdampflokomotive) goods train tank locomotive with the Deutsche Reichsbahn-Gesellschaft. It was intended for duties on branch lines and was delivered by almost all the locomotive building firms working for the Reichsbahn. From 1942 it was built in a simplified version as a 'transitional war locomotive' (Übergangskriegslokomotive or ÜK). The most obvious changes were the omission of the second side windows in the cab and the solid disc carrying wheels.