Bochum - Eisenbahnmuseum Dahlhausen Köf 47 37
Initiator of the development of the unity small railroad engines was the German national railway society. After the successful introduction of the machine announced fast also industrial - later also military - buyer her interest. Within the scope of from the middle of the 1930s the following armament numerous industrial buyers and military places received accordingly unity small railroad engines.
Also after the Second World War the unity small railroad engines of the achievement group II were built even further. The biggest buyer was with the German Federal Railroad also here a state road society. The German Railways procured between 1948 and 1965 another 736 units.