Whats your oldest personal possession

I have a metal piece from the civil war that says something "dragoons" on it, was my Grandma's great-uncle's I believe, I found it on a shelf in a room full of junk, and now I don't remember what I did with it. But it is somewhere around here. Not considered valuable by collectors or anything and I didn't know my Grandma had it even. I also have her wedding rings from 1925. So tiny.