I can't find any photographic proof, but the puzzle car fits the following description:
"Cock returned to the 1970 RAI with a 3-wheeled city car, equipped with a 50 cc Sachs 2-stroke engine that powered the rear wheels through a chain transmission. The length of the car was 2,07 m, the width 1,20 m and the height 1,55 m. There were 2 seats that turned in the direction of the door opening for better accessibility. Idea was to deliver the car with automatic clutch (they probably mean gearbox) and with 3 gears (probably manual), that can reach a maximum speed of respectively 25 and 35 km/h. Also an electric variant would be produced. If the city car, baptised Cockpit-70, proves to be successful, the possibility exists to build in a more powerful engine that makes a top speed of 50 km/h possible. Due to the limited market, the car never got past the prototype phase."