New to your forum. Just a few posts now.
When I was a child we lived outside of Pawling New York. For fun, I would poke around in old trash dumps looking for mostly bottles. I found this while digging where an old barn or out building used to be. I didn't know that then, I was just looking for milk bottles and it seemed like a good place. The dumps were so old usually just glass, china, and metal were all that remained. When I found it I was using it as a digging aid. How stupid. I found its way home and my mom saved it for me and put it up somewhere.
Could never figure out what nationality it was, and when was in college, a chance trip to the Smithsonian had fully intact specimens and it appears to be French. From a Charville Rifle. The lower ridge has hollow ground surfaces on each side. An estimated overall length was maybe 18" to 20". Some of the tip and the lock ring have been lost to time. This is all of it that I found.
Any info would be nice. I can take more pics if needed. I've never cleaned it.