The Acme Metropolitan Police Whistle is a popular and recognizable type of whistle used by police officers and law enforcement personnel. Acme Whistles, the company that produces them, has a long history dating back to the 1870s. They are known for manufacturing high-quality whistles used in various professional fields, including law enforcement, sports, and marine activities.

The Acme Metropolitan Police Whistle is a specific model designed for urban policing. It is characterized by its loud and distinct sound, which makes it an effective tool for commanding attention and signaling in crowded or noisy environments. The whistle is typically made of metal, usually nickel-plated brass, and features a cylindrical shape with a mouthpiece on one end.

These whistles are not only functional but have also become iconic symbols associated with law enforcement. They are often seen in movies, TV shows, and various forms of media depicting police officers and their equipment.

It's worth noting that Acme Whistles produces a range of different whistles, each designed for specific purposes. The Metropolitan Police Whistle is just one of their many models, tailored for the needs of urban law enforcement.