Yesterday my Mom sent me a picture of this interesting iron tool she found at the "Saw Pit" site where I found so much stuff at recently.

So I was wondering what you guys think it is. Is it a chisel? or some other wood working tool?

Also the markers mark is kinda fancy which tells me it was not just a ho hum tool but something important. Besides google, is there a source that can help us find info on old markers marks. I am sure there is but I don't know it.

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Please let me know your thoughts.
Thanks, Jared