Whilst decorating my dining room/office/radio room (the two latter descriptions are are a comment from 'er indoors from time to time) I came across two cylindrical whistles. They are quite similar and are stamped ARP (air raid precautions for those not old enough to remember WW2) with the address of the manufacturer - already mentioned in a previous post - J. Hudson & Co., Barr Street, Hockley, Birmingham.
I was not in the ARP (too young of course) but did get issued with these whistles when in the Fire Service. They still existed in the nineteen sixties, I guess, as we had not yet entered the throw away society. :disgust:
These whistles were replaced, in my Brigade in the nineteen seventies, by the 'Acme Thunderer' whistle which were louder in sound. The cylindrical whistle sound will be recognized by many former policemen and those who watch black and while films with police chases in them. The Acme one sounds like the whistles issued to railway guards.