Whats your oldest personal possession

Wish I had all my GI Joe's and Hot Wheels from the 60's. $$$$$$$$$$
I gave mine to my daughter, who has them for her daughters to use and abuse once they are old enough not to try and eat them. I was looking for my masking tape one day when the daughter was 5 or 6, gave up on finding the tape, go to gather her up to go to the hardware store to get some, walk into her room, there's the tape. She had used it to make highways for the Hot Wheels/Matchbox cars. She had the Matchbox tractors and construction equipment parked around the freeway in an appropriate manner as if they were doing something constructive. I bought extra tape. Other than that, a Model 69 Winchester .22 bolt gun, it was my fathers when he was a kid. Wreaked havoc on the indigenous wildlife of the Mojave desert with that rifle. :lol: Don't tell the tree huggers!