Just off the top of my head, I'm using a simple old plane and rasp that used to be my dad's. That makes them working antiques. It's kind of a neat family connection to still have and use them, remembering my dad using them.
The rules: it has to be something you use regularly, not just a cute antique!
Let's see, our frig and drier (both Kelvinator) and stove (Magic Chef) are each 20 years old.