Ok, here’s my dilemma…

I just got lucky enough to be ‘issued’ an Honest-To-God Post-World War II Rebuild – definitely not a parts gun, got it straight from the Korean War Vet who carried it. However, there is no “cartouche” as we regularly know it – now this isn’t odd because, as we know, not all the rebuilds have the standard “SA” over initials.

But there is a curious “A4” below the comb (see the attached picture) – This is what I can’t identify and am seeking help with. I know there were a number of rebuilds outside the Springfield factory with odd cartouches (“AN” for Anniston; AA, AAG, & AA#### for Augusta; etc.) but I can’t find any reference to an “A4” anywhere – not in Canfield of any of my other books. The only other marking on the stock is a block “P” (no circle).

Any help would be appreciated and thanks in advance.
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