The engraving “ARP” on the whistle suggests that it is related to Air Raid Precautions (ARP), a civil defense organization established in the United Kingdom before and during World War II. ARP wardens were responsible for enforcing blackouts, assisting in air raid shelters, and helping civilians during bombings.

Whistle Identification

• Manufacturer: J. Hudson & Co., Birmingham, a well-known maker of police, military, and civil defense whistles.

• Engraving: “ARP” likely indicates it was issued to ARP wardens during WWII.

• Material: Likely nickel-plated brass.

• Chain and Clip: Often worn by ARP wardens on their uniforms for easy access.

• Time Period: Circa late 1930s to mid-1940s.