This is pretty cool. Worth a look.
In 1967, a plumber doing renovations of an apartment building outside Chicago tore down a brick wall and found what would prove to be a baffling mystery to vintage motorcycle enthusiasts - a one-of-a-kind motorcycle bearing 1917 plates and the name "Traub". The building’s elderly owner admitted that his son had stolen the bike before going off to WWI, never to return. But where the bike came from and who made it remains a unknown to this day
Read more at: http://www.heavy.com/moto/2012/04/my...ub-motorcycle/