I am currently working on this so here is what I found. BSA seems to have had multiple assembly lines working that were assigned certain s/n blocks.
AV prefix rifles are found with both 1943 and 1944 dates.
AX prefix rifles are found with 1943 dates.
no prefix rifles in the 3XXXX are found with 1943 and 1944 dates.
I have yet to find an AY or AZ prefix.Information
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