If I had to hazard a guess, I would say that this is a Kay guitar. A friend of mine inherited one from his grand-dad and it had the very same pick-guard held in place with screws, and come to think of it most everything else about your guitar reminds me of his. Do a search for Kay acoustic guitars...you will even find that the serial numbers match up. But then again, maybe its just me.
I see nothing that indicates Gibson and much that indicates Kay/Harmony or even Framus, and it looks like at least the headstock has been stripped. That's not to say it couldn't be a playable axe after a good set-up (that nut shim has to go).
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