Just checked out the rest of the .22's. Only 5 out of 10 rifles spanning .22 Short Mk I through Rifle No. 2 Mk IV* that currently standard rear sights have the 25 yard line added to the rear sight. The rifles earlier than .22 Patt 14 No. 1's lacking the markings and only my .22 Patt 1918 is lacking the mark (due to the fact the rear sight is m/m) for the rifles that include .22 Patt 14 No. 1 and later.