In ten years, no less than six significant inventions have sprung from Greubel Forsey’s EWT think tank, three of which (to date) have been celebrated by Invention Piece (IP). In 2007, IP1 paid homage to the Double Tourbillon 30°; in 2009, IP3 honoured the Tourbillon 24 Secondes. And today IP2 pays tribute to the Quadruple Tourbillon with a completely new architecture in which the focus is on its exclusive mechanism.