So is it worth any thing?
Is it worth restoring?
Should I keep it in its present condition?
You can't plan to retire on the proceeds of selling it.
But, IMO, you should at least clean and stop the red rust on the blade before it rots it clear off the handle eventually.
I'd clean it with 0000 grade steel wool and oil to stop the active rust if nothing else.
I agree the logo could be an Arrowhead - A.
Or a Ceder Tree - A.
Or a something -A.
Work the Goggle Internet Machine till you give up, and maybe you can ID an old maker that used the logo.
However, in my humble opinion, the blade design, grind, and overall shape of the knife points to amateur knifemaker WWII work to me.
I don't think it is refined enough for a skilled custom maker.
And I don't think it is a cheaper commercial butcher knife or something, or the blade would have been all used up from constant sharpening.
rc