Matel Chain Survival Whistle Necklace

Material:
Chain:Metal
Whistle:Metal
Description:
Military Air Defense Whistle Necklace In 1883, British inventor Joseph Hudson was inspired by the sound of the violin and invented this unique whistle. Then the British ACME manufacturing industry improved the design of this whistle for soldiers to use, bright and penetrating on the battlefield. The powerful whistle can help soldiers exchange, communicate and other signals. During the war, soldiers use the bright and penetrating sound of the air defense whistle to use one long and one short, long and three short whistles as the army to convey evacuation, warning and other signals. From anti-aircraft posts to accessories that are close to life, the whistle travels through history.