File:30.5 cm mortar.jpg

World War I. Description in the original: An Austrian 30.5 centimeter mortar in position. The gunner is ready and the officer is just giving the command to fire. Meanwhile, another great 12-inch shell is being brought up for the next loading.

From J. Reynolds, Allen L. Churchill, Francis Trevelyan Miller (eds.): The Story of the Great War, Volume V. New York. Specified year 1916, actual year more likely 1917 or 1918. Retreived from http://www.gutenberg.org/files/29341/29341-h/29341-h.htm

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