Whistle & Cord
Documents clearly show that Air Raid Wardens were issued with a whistle and a cord. Exactly which kind of whistle is hard to determine - whether commercial versions or military ones were sourced is currently unknown.
There exists a very large number of plastic whistles with “ALERT” and “Made in U.S.A.” on one side, and on the other the victory ‘V’ letter and Morse code for the letter V.
Many of these whistles are made with two different colored halves, often marbled in appearance. Solid color whistles are also found.
These could be what is known as ‘war shortage’ whistles. Being made of plastic, they replaced metal for use in war industries.
I’d be very interested to hear if anyone has a whistle with bona fide provenance. Also, if anyone knows more about these ALERT whistles, please drop me a message.