from my 4.7in on travelling carriages hand book it mentions '' Extractor. cartridge, hand, Q.F. .small, land, Mark I. this is made of steel, having a claw at one end to engage under the head of the primer or adaptor when extracting the cartridge. the opposite end is fitted with a wooden handle, and has a loop of white cord for securing it to the wrist. Total length 10 1/2inches. So if you see something like this you will know what its for. You need a picture of a hand , long?, naval, Mark??