The SM on the rear sight is 'Singer manufacturing' (of Singer sewing machine fame) a UKmanufacturer of parts for the No4
The SM on the rear sight is 'Singer manufacturing' (of Singer sewing machine fame) a UKmanufacturer of parts for the No4
Mine are not the best, but they are not too bad. I can think of lots of Enfields I'd rather have but instead of constantly striving for more, sometimes it's good to be satisfied with what one has...