These are size plus 0.030" unissued Mk3 foresight blades for the Lee Enfield No4 Rifle. The Mk3 foresight blade is also known as the Canadian pattern blade and has an undercut rear face for maximum definition of the foresight tip. The blades are mounted on a split dovetail and may be fitted to either solid or split foresight blocks. Sold individually. British Army Part No B1/CR349. Stock No 41/44.