LOT OF 2 PIECE NAUTICAL ANTIQUE BRASS NICKEL BOATSWAIN'S PIPE BOSUN WHISTLE KEY CHAIN A boatswain's call, pipe or bosun's whistle is a pipe or a non-diaphragm type whistle used on naval ships by a boatswain. It is pronounced, and sometimes spelled, "bosun's call". The pipe consists of a narrow tube (the gun) which directs air over a metal sphere (the buoy) with a hole in the top. The player opens and closes the hand over the hole to change the pitch. The rest of the pipe consists of a "keel", a flat piece of metal beneath the gun that holds the call together, and the "shackle", a key ring that connects a long silver or brass chain that sits around the collar, when in ceremonial uniform. SIZE- 5" Inches MADE OF BRASS NICKEL FINISH WEIGHT - 26 GM EACH This is Reproduced antique. This is a great item with an awesome look! Nickel Finish Brass Whistle Very nice collectible.