Est. Value: $750,000 to $1.1 million
Bertone, it seems, had a problem with ordinary car doors. The Testudo, based on a Chevrolet Corvair Monza chassis, had a flip-up glass canopy. Even the steering wheel was out of the ordinary. Instead of a circle, it was a rectangle with handles at the outer ends.
With its pop-up headlights that laid back flat during the day, the Testudo's design influenced many later cars, including the Porsche 928.
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Last updated April 29 2011: 12:57 PM ET
Source: RM Auctions