I found this item in a field in Luxembourg where I have found stuff from the 1600s - modern times.
It appears to be made of copper.
The bottom makes it look as if it had broken off of something else but I'm not 100%
Any info is appreciated as I have no clue.
Glad to see you back . the what is it forum is my favorite . the piece shown looks solid to me and I took the'' spinny'' thing to mean it resembled a toy called a top.