WW1 French Heavy Artillery Gun 'Cou Cou AH 75 Le Voila' battle brooch

A very scarce original First World War period French made silver plated pressed metal title circlet '1914 - 1915 Cou Cou AH 75 Le Voila', heavy artillery gun 75 to voided centre surmounted by a devil's head. Very good condition, complete with original pin fiitting. Diameter 25mm.