The Acme Thunderer No. 560 Official Referee Whistle is a lightweight safety whistle made of black plastic, designed for use in outdoor activities such as backpacking, camping, and hiking. With its official referee design and durable construction, this whistle is a practical and reliable tool for signaling emergencies or attracting attention in any outdoor setting. Made by the renowned brand Acme in the United Kingdom, this whistle is a must-have for anyone venturing into the great outdoors.

New in package. Sealed.