From Nieder Salzbrunn to Halbstadt
In Silesia the constantly increasing number of passengers at the end of the Kaiser era could no longer be handled with the standard trains for the period. Consequently, the KPEV (Royal Prussian Railroad) ordered a total of six three-part powered rail car trains in 1914, which were designed for the special characteristics of the line with its numerous grades and sharp curves. The trains, initially designated as E.T. 501-506, had a striking appearance, which was based on the usual passenger train car of the time with clerestories, truss rods, and recessed doors. The motor car positioned in the middle between the two cab control cars guaranteed good running characteristics, even on parts of the line with sharp curves. When passenger levels to what was now Halbstadt in Czechslovakia decreased after World War I, these rail cars (now designated as the class ET 87) were used on other routes in Silesia with gentle grades.