Mason Cane Dogs Bowl Lettered DogMason Cane Dogs Bowl Lettered Dog 8ut on the field without an Acme Thunderer. Hang on your keychain or neck for security. Small whistle with tapered mouthpiece produces high pitch, an ACME classic. HISTORY After his success with The Metropolitan Whistle, Joseph Hudson went on to revolutionise, ably supported by his son, the world of whistles. In 1884 the Acme Thunderer was launched. This whistle, the first and still the worlds leading pea whistle, offering total reliability, control and power to the referee, has, continued to be developed. It is now the world's biggest selling whistle, there is not a major league or sport that has not been graced by this whistle. Items Postage and Packaging Charge Uk only 0.75p