Boatswain's call

An unmarked silver or silver plated boatswain's call. It has a barrel shaped buoy that has a crown and anhcor embossed on both sides. There is a decoration on the keel. A metal ring is attached to the end of the keel. There are three metal ringed bands placed at equal intervals along the gun, which is slightly curved, with a forth band at the end. There is a light patination on the buoy and the gun on the call.