These cars had a common underframe and a raised brakeman's cab, and were used together with similar types for express trains in Prussia, and sometimes also abroad. After World War I, most of them remained with the Deutsche Reichsbahn and continued to be used in express train service. From 1930 onwards, there were so many more modern cars that the four-axle compartment cars were gradually transferred to regular passenger trains; many of them later ended up with the Bundesbahn.
