What stuff have you found in your cars from previous owners?

I found a Scheafer Ball Point with the name of a local promotional items company in the headliner of the 69 340 Swinger 4sp car that I am currently rebuilding. The owner happens to be a customer of mine so I called him. He said it was an early 70s Sheafer model that he remembered !
Pen has probably been there since early 70s ...so its most likely a local car.