New to the forums. What do I have? (pics added)
 

Hello. I’m new and very glad I found this place. Im in the SE USA and have come by lots of antique weapons in my auction buying. I normally do estate sales, storage, and seizure auctions. I’ve seen everything from ugly fakes to very nice legitimate collectible edged weapons. I’ve saved a few things that I never identified but in the past I’ve received many authentic rare German WW1 and 2 daggers and swords. The oldest authentic weapon I had come by was a late 17th/early 18th C German “heavy” rapier that a dealer gladly took off my hands. I’m no expert so I apologize if this is nothing special. I don’t know what the euro pattern sword could be and I also have a Chinese bronze dagger/sword not pictured (lots of fakes I understand). So does anyone know what I have here??

Your pictures-

Swords are not my area, but there’s a lot going on with that tang area.

Whatever construction type it was, the crossguard and/or basket/cup was multi-piece construction as a more typical crossguard with a central hole won’t slide on and get in that groove.

I’m not currently able to find anything of similar construction type.

The overall shape reminds me of the Hudsen Bay trade blades, but yours looks longer and narrower than usual for them.

Maybe it’s not even a sword blade? What’s the length and width of this thing? Maybe it’s a spear point?

Yes looks to be a trade blade , though I do agree its longer and narrower than any I have encountered so far . The tang cross piece is typical of these blades. I suspect it was one designed to be used as a lance or spear rather than a knife.

Thickness is around 5.5mm.
Width is 30mm at widest.
Length is 20” overall and blade length only is 17”

By jove I think you got it there TRL!

In "Swords and Blades of the American Revolution" (1973, George Nuemann). p.225, 140.PA......there is a pike which seems blacksmith grade of c. 1775, found in Champlain Valley sites. This shows that curious extra bar, while this blade in OP shows better quality blade it does seem made 'in this manner' perhaps it is a European example possibly copied by a colonial blacksmith in the Nuemann example .