No, no Frisky-link here. The man behind the whole project, Puck van Beekum in Scheveningen (near The Hague) started in 1956 with import of the Swiss Belcar (license of the German Brütsch. The Swiss factory wasn't able to deliver the cars, and therefore a tubular chassis for the three-wheeler was built in Delft, which got a Victoria engine and Belcar produced body. But the thing is impossible to sell, and the Swiss Belcar goes bankrupt.
Van Beekum has lost a lot of mioney with this project. He decides to start a new car project to earn his money back: the Citeria. the first prototype is a little mid-engined sportscar with a Rotax two-stroke engine and polyester body. It is presented on a plastic fair in Amsterdam in February 1957 and it is tested on the Zandvoort circuit. It appears to have an excellent roadholding, but it would be too complicated to produce in big numbers. Therefore a new prototype is developed, this time with the engine and many other technical parts from the BMW 600 (as ImpishGrin already said). Again the body is made of polyester, and the grille and windscreen frame are of cast aluminium, but the hardtop is made of steel. The car is presented to the press on 17th of November 1958, and it is even shown on television. Stirling Moss and Carel Godin de Beaufort are attending to the presentation. But a few days later mister Van Beekum was arrested by the police, because he hadtaken 427.000 guilders with false cheques (in those days that was enough money for some 100 Volkswagen Beetles...). The two cars went to a car crusher, who used the first prototype and sold the other soon to another owner, who uses the car during a few years and than puts it in his garage. In 1991 he decides to restore his car, and the excellent result is shown here...