Well, will reply to my own as I did hear back from the state archeologist on this. He also conferred with one of his sources. And based on what they know the blade is somewhere between 1835 and 1890. Due to construction, configuration and the stamp. Along with other items.
So, not bad. Not fur trade as it is too new. Knew it "could not be" colonial. With a nudge to the earlier side of the range.
But still a nifty blade for sure.
