In the '50s Perramon, Tachó and Vila started an adventure that would lead them on to manufacture one of the most widespread micro-cars in post-war Spain, the PTV 250. The PTV came as a great revelation in its day. In spite of being a micro-car, it did not look like an egg or a shoe with wheels, it was aesthetically and technically superior to its competitors.

1950	The first prototype was called "ballena" In their spare time, and with more illusion than resources, the Tachó brothers manufactured a car in their small car repair workshop in Manresa. The result was a truly attractive and elegant vehicle that managed, overcoming all the bureaucracy of the period, to get registered.
1953	The way towards the PTV, the so-called "coca" With the possibility of mass production in mind, Guillem Tachó built a car, trying to simplify the design as much as possible. "This car looks like a coca!", exclaimed its creator one day, commenting on the unfortunate similarity between the car and the traditional Catalan cake, the coca. This car was also registered and travelled many kilometres in test runs to optimise its potential and perfect its various weak points.
1956	PTV 250 Maurici Perramon, businessman and habitual client of the Tachó workshop, had faith in the project and together with Josep Vila, who had already collaborated in the construction of the coca, set up a public limited company with Guillem and his brother Antoni to mass produce the PTV 250, the more attractive version of the "coca". In this way, AUSA Center, S.L.U., was created.
1956-1961	1100 units were sold The PTV was marketed all over Spain. Soon they could be seen everywhere, even in sports competitions and in films of the era. It was a fast car, solid and reliable. A postcard was received from Berlin in which a happy owner described the excellent performance of his car during the journey.
1961	Prototype of the PTV 400 Guillem Tachó built a prototype which should have been the natural successor to the PTV 250, the PTV 400. But this impressive model was never launched on the market. The appearance of the SEAT 600 ended the era of the micro-car in Spain. AUSA was the only manufacturer to survive, its illusion for mechanics and its vision of the future led the company to venture into unknown territory for that time, launching a small car with a dumper-like skip. This is how the famous dumper came into existence.