Thread: Which old girl is this exactly? Bsa 7x57

I'm just trying to rack my brains from when I did a real deep dive on a few BSAs I owned so this is all off the top of my head and gets a bit confusing trying to explain it clearly but find that proof mark and :

E =1955
F =1956
G =1957
H =1958
I = this is a funny one, aparently the Birmingham proof house never used I in their markings (perhaps to prevent its confusion with a lower case L?) so if you have an I you have a unicorn
J =1959
K =1960
L =1961
M =1962