Harzer Schmalspurbahnen (HSB) steam locomotive type 2-10-2T number 99 7237-3 is known as a "new" engine (Neubaulok) since it was built between 1954 and 1956 as their oldest engines were constructed as early as 1897. A number of these 2-10-2T engines were built in Babelsberg. Founded in 1892 the Orenstein & Koppel Company (O&K) was a German engineering firm that built locomotives and railway cars. After the end of World War II the German Democratic Republic (East Germany), changed O&K's name to the VEB Company. In 1946, the Babelsberg factory resumed production of locomotive boilers delivering its first postwar locomotive one year later. The GDR nationalised the railroads and rolling stock manufacturers renaming the O&K plant in Babelsberg the LOWA Lokomotiv Plant Karl Marx (LKM). In the late 1950s the plant developed steam engines for the Deutsche Reichsbahn narrow-gauge railways building approximately 4,160 engines including these 2-10-2T locomotives.