The Vintage Metal The Metropolitan Whistle by J Hudson & Co. is a unique and collectable item that holds historical significance in the theme of police memorabilia. This whistle, designed in a police-related style, would have been used by law enforcement officers in the past. Its sturdy metal construction and distinctive design make it a sought-after piece for collectors interested in police memorabilia. Perfect for adding a touch of nostalgia and unique flair to any collection.