Silver boatswain's call with a barrel-shaped buoy bearing a foul anchor device on each end.

The gun has three rope-pattern bands and another at the mouthpiece. The keel is decorated with diagonal wrigglework engraving and has no scroll at the end and no ring. A short gold chain runs through two holes in the keel.

The boatswain's call has a long history both as a symbol of office and as a practical instrument for conveying orders at sea. Its distinctive shape has remained practically unchanged from medieval times to the present day. The call's shrill whistle can be varied in pitch to convey a variety of information, and can be heard above the sound of wind and sea. Such instruments were private possessions rather than official equipment and silver calls like this one made suitable gifts and presentation pieces.