To debut at BASELWORLD 2009, the 2nd Fundamental Invention by Robert Greubel and Stephen Forsey features four tourbillons which contribute independently to its exceptional time-keeping performance.
This is made possible by the asynchronous position of each of the four tourbillons, which are connected to two autonomous regulating organs. These organs, each housed in a tourbillon cage, and are coupled to the spherical differential which ensures transmission to the display system.
The movement is a patented hand-wound caliber, comprising 531 components, with 63 jewels, beating at 21,600 bph and with a power reserve of 50 hours. The two interior tourbillons at a 30 angle rotate every 60 seconds, the two exterior tourbillons rotate every 4 minutes.
The case, in 18kt rose gold, measures 43.5mm. It features an asymmetrical convex sapphire crystal and display back (with a lateral window done in a shaped sapphire crystal). It is water resistant to 30 meters. The dial is solid 18kt gold which has been blackened. The strap is alligator.
