When I was making some door panels for my old '39 I found this old 1917 penny in the corner of the bottom of the door. I can only imagine how long it had been there. When I sold the car later that summer I left it in the car. I figured it had been there that long and it should stay there. Oh, the places that penny must have travelled riding in the door of that old jalopy!
I also found an old weed pipe under the passenger seat of a Nova when I took out the carpet to replace it.