I do not do any machining or metal work and have no use for this monster. Would like to look into getting it into the hands of somebody who could use it, or if not, scrap it.
Tried to add more photos, but it won't let me for some reason. Says Carlton, Cincinnati O USA, 4 ft arm on 11" col.
Best I can give you is that it was found by my great-uncle who was a coal miner in the 1950s and '60s in Southeastern Missourri, USA. He had a collection of about 50 smaller points as well, but a cousin stole those some years ago.
This beast is heavy, is about 5 inches wide, and about 14 inches long.
Edit: Next time I'm over there, I'll get some more pictures, measurements, and weight on it and repost.
I know the pictures are blurry, but they are tiny bugs, and it's the best my phone could do. I found one crawling on my hand yesterday and one today. Any guesses or leads?