Time to move this up to the Pros...
Indeed!
It's the German "Puck"
The one-off was built in 1952 by the brothers Krick from Hofgeismar. The chassis was donated by VW, the rear axle was borrowed by a Opel Kadett. The body was hand made of Aluminium.
Powered by a Zündapp KS-600 rear engine it developed 22 HP which
supposedly propelled that tiny car to a top speed of 150km/h