WW2 1940 Adie Brothers Whistle. Dated with Broad Arrow.

WW2 1940 Adie Brothers Whistle.  Dated with Broad Arrow. Many whistles were used by many branches of the armed forces and civil units during WW2. These included, the Army, Navy, Royal Air Force and United States Air Forces, who used them as emergency signalling whistles and had them attached to their uniforms or equipment. The Air Raid Precautions (ARP) and Fire Service used them to signal air raids and dropping of incendiary bombs.