Hello everyone,

Here's a barreled receiver which I recently acquired; upon inspection, I noticed this DP mark in what I consider an unusual place:


Another peculiarity is this extra number on the receiver:


Seeing this, I then looked more closely to everything else. The proof and inspection marks on the right side of the barrel attracted my attention. Isn't there some stamping on TOP of the usual ones seen there?


All of this brings me to ask: what's going on, and what should I do with this barrel and receiver?

Thanks in advance, dear colleagues,

Lou
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