STC359762 One of the heavy guns used by the Allies in its Massive Screened Position on the Somme, 1914-19 (litho) by French School, (20th century); Private Collection; (add.info.: heavy naval ordnance and other monster howitzers of 15 in. and 16 in. calibre were freely employed in the artillery bombardments that preceded the Allies\' advances; They were moved on specially constructed railways;); The Stapleton Collection; French, out of copyright.