It says the word PATENT. Also has 2 stars and the numbers 1 4 and maybe one more number. I think it’s some sort of bullet head stamp or something but am not sure, any help would be appreciated.
Put a penny beside it, and turn it over.
For size and another look.
I was thinking the same thing too!!Although it does look like a jeans rivet button...I would not rule out a kerosene lamp wick riser knob, I think I see the word "Patent" in an older font.