At the end of the 1960s, Italian Alfredo Belponer wanted to realize his dream of building his own endurance sports car. However, despite a promising design and prominent support, the project failed during the development phase - as did the attempted revival five years later. While the "Panther" went into circulation thousands of times as a Politoys toy, the life-size original remained a one-off. This article from the series "Technology in racing cars from 1958 to 1978" presents the ambitious but thwarted three-liter prototype and shows it in historical footage.