Almost certainly one of the oilers comes from the Lee Enfield No. 4 design (if that helps), it was designed to fit into the brass covered trapdoor in the rifle butt along with a pull through and patches for field maintaining the bore. This was particularly vital with the old corrosive primers in the 40s as the chemical salts would damage the bore if not dissolved. Later the oilers became Bakelite and plastic
Nice bit of kit - happy to show photos of one in situ if anyone else is restoring an Enfield!