 By the time of World War II most had been replaced on naval ships but several stored guns were used in combat on improvised stationary mounts by Land Coastal Defence units in the Battle of Kępa Oksywska in September 1939.The Romanian Navy used the Škoda-produced version of the gun.The gun was used as secondary and later tertiary armament on the Romanian monitors of the "Mihail Kogălniceanu" class.