Original British WWI Lewis Gun Spanner Wrench Tool - Notched & Beveled British Bayonets The brass box lock is

The brass box lock is marked RIVIERE on the left side plate and LONDON on the right with British proofs on the underside of the barrel

The tang (nakago) has three holes (mekugi-ana)

ten-round "pre-feed" mechanism giving it a firing rate of 1

it even disassembles like the original

Maker Marked "WH"

Original British WWI Lewis Gun Spanner Wrench Tool - Notched & Beveled British Bayonets The brass box lock isOriginal Item: We have found a few very scarce tools for the Lewis Mk I Light Machine Gun as used in the First and Second World Wars. "Spanner," in American English, means "wrench," of course. This tool was designed to perform either two or three functions, depending on which model spanner. The first model was intended for removing the barrel mouthpiece, which is a funnel like piece that was critical to pulling cool air over the radiator cooling fins.