Two cars are closely associated with John Lennon: the blue Ferrari 330 GT that was his idea of a sensible first car and the Rolls Royce Phantom V he decorated to look as if it belonged to the king of the gypsies. But another deserves to be mentioned, due not just to the affection Lennon felt for the model, but also for the starring role that it played in the promotional film for the album Imagine.The 1956 Princess was the flagship of the now-defunct Austin marque and Apple Records used several of them to ferry the Beatles around. This 1956 model was John Lennon's personal property, and is being offered for sale by Sotheby's, along with the original vehicle registration signed by Lennon when he bought it in 1971.The Princess was donated to the Austin Rock and Roll Car Museum in Texas in 2008 and part of the proceeds from the sale will go to charities including Unicef and Make A Wish America.Buyers will get a touch of Lennon eccentricity with the five aircraft seats he put in the back.It is not the only car in the sale with a celebrity connection. There is a 1966 Mercedes 300 SE Cabriolet that belonged to the North by Northwest star James Mason...