The Challenger G12 is one of Volker Behrens' most popular long distance models. It is much lighter and smaller than the famous Challenger III and the flight range can exceed 150 metres with proper tuning, weighting and throwing. This particular Challenger G12 was Volker's personal favorites and it was one of only two in his personal throw kit at the time of his death. This Challenger G12 is thicker than the other Challenger G12 boomerangs that I have seen. Most have a thickness of 2.5 mm. This one has a thickness of 3 mm. Volker modified the underside of the blades to enhance the performance by fine tuning it for extreme range. I wish I was able to test throw it. If you look at the photo below, the modifications are shown where the initial paint has been filed off, mostly on the trailing edge. This boomerang does not have tape or weights, so you may need to fine tune the flight by adjusting weight to match your style of throwing. There is wear on the paint from throwing, but no chips or dings or other form of damage. This boomerang has great collectible value because it captures Volker's method of fine tuning the airfoil for extreme range distance throwing. For experienced LD throwers only, please.