Shell WW1 History Source Pack

http://www.iwm.org.uk/collections/item/object/205195248 Figure 6. A war office photograph of a wounded British soldier holding his steel helmet, which has been pierced by a piece of shrapnel, during fighting on the Somme Front near Hamel in December 1916. This photograph was distributed by the war office to show soldiers that the newly issued steel helmets were effective; in this case it almost certainly saved the soldiers life.