 Three S 10.2s were fitted with "Stumpf" parallel-flow cylinders ("Gleichstromzylinder") for test purposes, whereby unlike the production models, the outer cylinders drove the second coupled axle.Even when they were converted to the standard configuration, the twin-axle drive was retained.One of these engines went to Poland after the First World War; the others were given numbers 17 203 and 17 204 by the Deutsche Reichsbahn.