For many years, Greubel Forsey has been working on the development of a new type of tourbillon. Over the past three years, this tourbillon has transitioned from concept to reality and is now unveiled as the 8th Fundamental Invention of the Atelier. The Tourbillon Cardan is designed to reach new heights of chronometric precision. It combines three principles. The first: the tourbillon. The mechanism patented by Abraham-Louis Breguet in 1801 was designed to compensate for the differences in rate, in vertical positions. While most tourbillons have a revolution of 60 seconds, that of the 8th Fundamental Invention is almost four times faster. Just 16 seconds. This is the fastest yet for a Greubel Forsey tourbillon. It moves through more positions in less time, and therefore offers much a higher average performance.