Acme Metropolitan Police Whistle

The original Metropolitan Police Whistle, known as the Wilderness Whistle, is loud and clear, a truly commanding product, excellent for general signalling and loved by many who want an unusual and distinctive call.
The sound of authority for over 140 years, reports in The Times during the 1880's covered preliminary tests of a new cylinder shaped airfast whistle with no moving parts.
Londons Clapham Common was the setting where, by all accurate accounts, Birmingham engineer Joseph Hudsons's invention could be heard over a mile. Results ever since have been global sales to over 120 national forces of some 45 million original style Metropolitans.