Harley Davidson Knucklehead 1947 Motorcycle 3D Model... Among the Awesome and Realistic 3D Model Motorcycles on this page, You'll find an Absolutely Perfect 1947 Harley Davidson Knucklehead 3D Model Motorcycle in Such detail that it's hard to believe that its not genuine photograph of a Genuine 1947 Harley Knucklehead. In The Real World the Harley Davidson Knucklehead Motorcycle is a Precious Jewel of a Bike which is treated as such, any one lucky enough to find one in restorable condition would snap it up at almost any cost. The 3D Model Harley Davidson knucklehead is almost as precious, for someone wanting the Perfect lines to represent the actual Bike in a Render, they'd be very happy to be able to use this Knucklehead model.