The oldest thing I own (and use!)

It was just a random thought: What is the oldest thing I own? I'm sure everyone has some old things stored away somewhere. Then I saw 82mhz's post on the same subject so it feels like the perfect time to share! I'm going to answer a slighty variation on this question, though I think the answer is basically the same: What is the oldest thing I own that I actually use or appreciate somewhat…