The One-Off 1987 Porsche 959 ‘Speedster’ in Photos

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The one-off 1987Porsche 959 'Speedster'

The custom build features a unique windscreen

The 959 "Speedster" in profile

The interior of the convertible is blue

Inside the custom build

the vehicle features a blue soft top and matching tonneau cover

The car also comes with a removeable white hard top

The one-off 959 Speedster could sell for up to $1.7 million at auction