Whats your oldest personal possession

A few of the recent posts triggered my memory.

I have a Steiff mouse that is one of the first toys I remember ever having.
Even if it was brand new when I got it (and I can't imagine it was) it's from the late 60's/early 70's. I looked it up and it's value is $200, more if it's older.

...and I have a Korean era US Army Air Forces flight cap that I picked up back when stuff at "surplus" stores was actually armed forces surplus. It's in GREAT sape. I'haven't valued that one.

I also have an 1800's monkey wrench that used to hang near the cellar door in my grand parents house. Never saw it used but it was always there as long as I remember.
I actually do use it. I keep it in my junk yard tool box. It's handy if I run into a large nut/bolt situation, and it can also be a hammer.