By J. Hudson & Co. Birmingham. A variation of the less commonly found 'tube' whistle used by wartime aircrews. Period photos show these hanging from the 1941 pattern Mae West or aircrew blouse. Manufactured in chromed white metal. Air Ministry King's crown markings and reference numbers '293/W/102' Lovely crisp clear clear marks. Excellent used condition. Guaranteed original and not one of the 'aged' copies now on the market. Stock code MW14824.