The world's first official sports whistle, the Acme Thunderer has been used by sports officiators and referees in England since 1884 and is still appearing in world sporting events every year.
The 60.5 is a small and neat solid brass pea whistle with a high pitch.
Made by: Acme Whistles
Made in: England, UK
Specifications: 1.75" long
Want to hear it in action? Click here to navigate to Acme's website and click "Play Whistle Sound".
Further Reading: Acme Whistles have been manufactured in Birmingham, England since 1870.