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Listen to him. He sounds like he knows more about it than I do. I'm just going by the look of it and comparing it to other ones of the period I've seen.
Hey Karl, do you have some reading or...

Nice find. Looks like after 1850 but before 1900 like others have said. Can't see the tail. That might help. Probably 60s or 70s. I too have never seen one jimped like that up the spine. I wonder if...