I have a racing frame that I acquired a couple years back that I think probably qualifies as a one of a kind from the race department. The gentleman I bought it from said he was a personal friend of Al Burke, a factory racer, and that Al gave him the frame. What is unusual about it is that it has a solid steel backbone and front downtubes. It ways a ton and my racing friends say it defies logic to build a frame like this. If it makes a difference I guess Al was the factories short track racer. I did find an article on line that talks about Al and that the factory made him a special frame.