The rather stiff license fees demanded by the creators were the reasons why Philips and Grundig decided to jointly develop a "Euro" cartridge system. The cooperation did not last long and Philips introduced a prototype in Europe in August at the Berlin Radio Show. Scarcely any product has drawn more attention of Japanese industry visitors then the Philips cassette. No doubt it was the most photographed product of that event. Of these only BASF tape was perfectly balanced in all its properties, in particular also the mechanical characteristics.