Clickers were an excellent method of communicating without arousing German attention by distinguishing between friend and foe.
This brass clicker, referred to as a "cricket", is a replica of the ones used by the 101st Airborne Division during the liberation of France in June 1944. Specifically, they were used during Operation Overlord on D-Day. Made of brass and inscribed with "June 6, 1944"(D-Day), "Operation Overlord", and "Normandy" on its sides.