This is a great example of the ‘P13’ bayonet, which although designated ‘P13’, fit the ‘P14’ rifle and was not introduced until ‘1916’. It is marked to the blade with ‘1913’ over ‘12 16’ (Dec 1916) a...
Make WWI British ‘P13’ MkI Sword, Bayonet Scabbard and Leather Frog. 20565:2.