Suffragette brooch or badge in the shape of a hammer, inscribed on the head, 'March 1912'. The silver brooch was presented to those W.S.P.U members who had smashed windows for the cause. The campaign of window breaking and property damage in central London in March 1912 led to the raid on the W.S.P.U offices and the subsequent trial of Emmeline Pankhurst, Emmeline Pethick-Lawrence and Frederick Pethick-Lawrence for conspiracy.