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The grand dame of all Porsches – this 1939 Type 64 will be up for grabs to the highest bidder when it goes to auction in the summer. It belonged to the Porsche founder, Ferdinand Porsche and his son Ferry. Only three Type 64s were built, but this is the only surviving one. The car is still in a very original state, with its original air-cooled flat-4 engine and some of its original tools and spare parts. It is expected to fetch 15-20 million U.S. dollars.