
Gyrodyne GCA-55. A hovercraft powered by a Porsche engine. (1959)
That would be THE ultimate rare Porsche collectable!

Professional stereo installation! Super bargain low price.

Its the T10 mine exploder. The concept behind this vehicle was pretty simple: large metal wheels were attached to the hull of a Sherman, which would then drive over a minefield to detonate mines. The wheels were strong enough to survive the blast, and the Sherman was held high off the ground away from the explosion.
The Sherman was a diesel M4A2, and, apart from the obvious running gear changes, had its frontal sponson armor re-shaped to accommodate for the large 96 inch wheels. This can just be seen above the closest wheel.
The resulting vehicle weighed as much as a Tiger I, and was impractical. It was cancelled in 1944.