A 14 pounder shell casing manufactured for the two prototype guns used by the Victorian Navy. Unlike the later Mk I and M II 14 pounders which used separate components the ammunition for the prototype guns was assembled into one fixed piece and crimped together.Only a handfull of these sheels are known to exist as later 14 pounder guns used separate shell casing and projectiles.Cylindrical shell casing made of brass.On base - "N"nordenfelt shell case, ammunition