This is NOT an early Porsche design! 🇦🇹 It is a self-made car by Austria's Otto Mathé in 1952 for breaking speed records on ice. It does have a Porsche boxer engine and VW Beetle components. It shattered scores of records.
Hermann Schwarz discusses the photo retrospective of Otto Mathé at this year's Classic Expo Salzburg: http://blog.leica-camera.com/photographers/interviews/hermann-schwarz-retrospective-at-the-classic-expo-salzburg-of-the-racing-car-driver-otto-mathe/