The only knife I ever found was a small Boker stockman with brown jigged bone scales and carbon blades. Its pen blade is snapped off at the kick, the Tree Brand badge is missing, and one scale is badly cracked. I found it by the side of the road a few years ago while out for a walk. I keep it in the tool roll of one of my motorcycles.
The best knife I ever lost was a cool little Western sheath knife that was taken when my car was broken into in college. It was not an expensive knife, but it was a gift from my father when I was a boy and my first ever fixed blade.