three series, all with modified lightweight bodies and in various degrees of engine tune. All bodies except the first Pininfarina prototype were produced by Italian coachbuilder Scaglietti, which already had a well established record of working with Ferrari. Historically, and especially since the mid-1980s and early 1990s, there has mostly been a considerable market price difference between a real berlinetta and a real spyder. Many berlinettas were turned into spyders by aftermarket mechanics, often to increase the car's monetary value or simply because of the owner's preference for an open car. Differences in value have typically remained, however, even after the most skillful conversions. Coachbuilt derivatives 365 GTB/4 Shooting Brake The stock 365 GTB/4 was delivered new to Philadelphia-area Ferrari dealer Chinetti-Garthwaite Motors as the 805th 365 GTB/4 produced with chassis no. 15275. It's there that architect Bob Gittleman asked Luigi Chinetti Jr. to design a unique car for him. Mr. Chinetti had already designed a Ferrari 330 GT 2+2 modified by Vignale and decided to design a shooting brake. The car was then sent to Surrey in England where Panther Westwinds built the car according to Mr. Chinetti's designs. The car was listed at Gooding and Co's 2016 Pebble Beach auction with less than 4,500 miles and an $750,000 - $1,000,000 estimate. The car didn't sell then. Competition versions The first racing version of the 365GTB/4 was prepared in 1969: an aluminium bodied car was built and entered in the Le Mans 24-hour race that year (the car crashed in practice). Ferrari did not produce an official competition car until late in 1970. The official cars were built in three batches of five cars each, in 1970–1, 1972 and 1973. They all featured a lightweight body making use of aluminium and fibreglass panels, with plexiglas windows. The engine was unchanged from the road car in the first batch of competition cars, but tuned in the latter two batches (to in 1972 and then around in 1973). The cars were not raced by the official Scuderia Ferrari team, but by a range of private entrants. They enjoyed particular success in the 24 Hours of Le Mans, with results including a 5th overall in 1971, followed by GT class wins in 1972, 1973 and 1974. In 1972 Ferrari 365 GTB/4s took the first 5 places of the GT class. The final major success of the car was in 1979 (five years