 During World War I, from 1914 to 1918, 35 more locomotives were produced.They were the last S 3/6 engines built for the Royal Bavarian State Railways.19 vehicles - including some brand new engines - had to be handed over to France and Belgium under the terms of the Armistice; the remainder went to the Deutsche Reichsbahn who gave them operating numbers 18 401 - 18 434, 18 441 - 18 458 and 18 461 - 18 478 in 1926.