The numbers 1 to 3 of the Lübeck-Büchen Railway were tank locomotives that were specially developed for the double-deck streamlined push-pull train. These trains were purchased to increase the comfort and capacity of light express trains and were the first trains in Germany to be either pulled or pushed without relocating the locomotive at the end of the route.

The locomotives were small and light compared to others used for express trains and, in contrast to the machines with a tender, had the symmetrical wheel arrangement 2-4-2T in order to be able to run at 120 km/h in both directions without restrictions. Smooth running was improved by the fact that both running axles were suspended in Bissel frames with a centering device.

The special thing about the trains was the push-pull control, with which the locomotive could be controlled from the control car. Due to the complex operation of a steam locomotive, however, it was only possible to move the regulator remotely using a servo motor, while the fireman had to operate the valve gear and other things.

Sectional drawing

Die Lokomotive, June 1938

Modern achievements were also used for the rest of the train, for example two car bodies rested in the middle on a common Jakobs bogie. The interior consisted only of second and third class, but unlike the other trains of the period, all the seats were upholstered.

In 1936 two locomotives and their carriages were completed, but because these new trains attracted visitors from all over the world when the line opened, another set was ordered the following year. This was followed by successful operation between Hamburg and Lübeck, which was converted to conventional trains in 1938 after the line was taken over by the Reichsbahn. The locomotives were now numbered class 60 and used in other roles.

In contrast to the wagons, the two locomotives that remained after the war came to the eastern part of Germany. They were used at different locations and were retired in 1954 and 1958 respectively.