The M47 identifies who made your rifle. This code was allocated to BSA (Birmingham Small Arms Ltd) during WW2, & all No4 rifles were produced at their Shirley Solihull plant. The S126 will be the code allocated to the manufacturer of the band (the list of manufacturers is in Skennerton's books but I can't remember who S126 was off the top of my head - no doubt someone will chip in). The 1943 is the date of manufacture. The L on the butt will probably indicate that the rifle is fitted with a long butt.Information
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