Royal Navy Ship HMS Gladiolus minesweeper sloop 1916 hallmarked silver brooch

A superb and very rare First World War 'HMS Gladiolus' sweetheart brooch, in the form of the ship with blue enamel title scroll "H.M.M. Gladiolus", the reverse bearing Birmingham silver hallmarks for 1916 and maker's details "AS & Co". Very good condition, original pin fittings,no damage to the enamel, complete with all masts and turrets, an excellent example.
Width 40mm.
Height 22mm.
HMS Gladiolus was a Flower Class Arabis sub class Steel Sloop built in 1915.