The one under the tarp w/ the lexan side windows is the only pre-production prototype in existance. It has much more hp than production models (Ferrari actually de-tuned them!). The pre-production model was the late Enzo Ferrari's personal Ferrari. After switching hands a few times, it ended up under Guiseppe Risi's (owner of Ferrari of Houston and former owner of Ferrari of Dallas) hands. It recently sold to a private owner.
You can catch the whole scoop about it in last month's Texas Driver Magazine.
