A buddy of mine just got (and resold) a '63 55cc Honda in original condition. The even bigger find was all the original paper that came with it! In all the brochures and shop manuals, etc. he had two copies of a Honda brochure in mint condition for the four models of the Honda "50". "It's not a motor scooter, not a motorcycle - it's a Honda "50", in a class by itself."
He gave me a copy, saying I was the only other guy he knew who would get excited about the bike and about the historic papers. We're thinking of getting a frame for it and putting it up somewhere.