Switching Dwarf in Industrial Work - The Köf II was once widely used in Germany as a switch engine and could be seen with its delightful shape at most of the German transfer yards. A total of 1,600 of this locomotive were placed into service from 1934 to 1965. Many of these almost indestructible small locomotives are still giving faithful service in numerous industrial operations and on factory railroad systems. The maximum speed, depending on the series, is 30 to 45 km/h / 19 to 28 mph. The most powerful versions had a 6-cylinder diesel motor with an output of 128 horsepower.