While attending a General Motors media event in Germany, the automaker laid out several old Opels, including this unique example of the GT sports coupe. While the mini-Corvette-styled GT is a rarity, the car you see here is one of only two ever built. The Aero GT was first shown at the 1969 Frankfurt Motor Show after the GT entered production.
The black roof is a removable targa top, and the Aero also had an electrically retracting vertical rear window. For some reason, GM opted not to produce the Aero, and only this example was mothballed for the last 40 years. The second car was sold to a collector, and its whereabouts are unknown.
Source: autoblog
Images: oldconceptcars