I have a small German coin (The obverse has a large adler flanked by two small swastikas, the reverse has a church, I believe) that my Omi had in her pocket when she moved to the U.S.A. shortly after the WW2 as a refugee. It's not much, is probably not worth anything, and out of context, most collectors wouldn't give it a second glance. However, it means a lot to me and I could never part with it.
Reverse looks like this:
As such, I've always wondered: What small, seemingly "insignificant" items do you guys out there have in your collections that you could never get rid of?