One of my all-time favorite cars. Book on Nick Mason's cars is a beauty of a tome as well. Just saw the Monterey reunion, and I think they said 20 of the 39 Ferrari 250 GTO's ever made were in the region at one of the 4 or 5 events occurring at the same time.
In a book I was given by my son on Ferrari cars, the intro to the section on the 250 starts out as:
"In motor racing, you're never a cheat until you're caught. Or, as some (mostly British) rivals routinely put it, you're Ferrari. For 1962, the Commission Sportive Internationale (CSI) decreed that the World Sportscar Championship would be replaced by a series for GT cars. In one of the most audacious acts of chicanery perpetuated in top flight competition, Ferrari took a more lateral approach to rule interpretation and built an out and out racer instead, the fabulous 250 GTO."
"The rules stated that one hundred cars needed to be constructed to appease homologation requirements. Between December 1961 and May 1964, Ferrari made just thirty-nine GTO's (the "O" preposterously standing for "Omologato"), The scuderia claiming that it was merely an evolution of the 250GT SWB, of which the requisite number had already been built. Aided and abetted by race organizers wanting Ferrari on their grids, this scheme worked"
Plus ca change....Ferarri cheating, who could imagine that happening.