Ferrari's main coachbuilder was Vignale up until the mid-'50s when Pininfarina became the designer of choice, leading to some of the most valuable cars of all time. The Berlinetta debuted at the Geneva Motor Show in 1956, showing off the long wheelbase and Columbo V12 that would go on to become a legend. Pininfarina had trouble with the increased demand of the new GT, and Carrozzeria Boano was brought in to finish the production run after Pininfarnia completed a handful of prototypes. The car pictured here is one of those prototypes built by Pininfarina, made for Enzo Ferrari's personal friend Guido Cantelli. Cantelli would die in a plane crash only months later, with Ferrari buying the car back from his widow. After passing through several owners, being repainted red, and finally being restored to its original color and married back to its original transaxle, this 250 GT Berlinetta is up for sale — one of the most historically significant Ferrari road cars ever made.