This is a No4 mk2 spike bayonet, better known as the 'pig-sticker', as fitted to the British Lee-Enfield rifle no4 mk1 and its derivatives, in very good condition. This is a Canadian manufactured example, made at the Long Branch, Ontario factory, marked with the superimposed LB symbol,  so to be more exact, is for a Canadian-issue mk1* rifle, made at Long Branch, but will of course fit all no4 rifles.  Very Nice Condition