Robert Greubel and Stephen Forsey unveil a new timepiece showcasing a large, high precision and inclined balance wheel within a 100 metres water resistant titanium case tailored for the most active lifestyle. The two inventor watchmakers took up the challenge of fully – and visibly – combining sport and chronometry! The unique ovoid case with ergonomic profile and integrated lugs, provides optimal protection for the movement. With this new calibre, the “Balancier S”, Greubel Forsey pursues the sporting adventure, pushing the technical limits to combine ergonomics, architecture and precision. A new flagship in aesthetics and performance, innovation and craftsmanship.
The completely new and original titanium case, firmly positions this GMT in a “sports” league of its own. In their creation of this timepiece, Robert Greubel and Stephen Forsey have pushed back the limits of ergonomics and wrist comfort. They have invented a totally new case form, perfectly round from above, while revealing the accentuated arched and ovoid shape from other angles. The aerodynamics of this timepiece 4 patents are reinforced by its integrated lugs and strap resulting in distinct functional forms that perfectly fit any wrist.
The ground-breaking spirit that is a hallmark of Greubel Forsey is particularly evident in this timepiece. It incorporates a globe to make three time zone displays visible. By reproducing the Earth’s rotation in real time, this timepiece offers an intuitive view of time all over the world and a day/night indication. With this creation, Robert Greubel and Stephen Forsey totally reinterpreted the very notion of the GMT as a watchmaking complication.
GMT Quadruple Tourbillon
Robert Greubel and Stephen Forsey have shown creative daring and boldness in uniting their second Fundamental Invention, the Quadruple Tourbillon, with their ground breaking interpretation of the GMT with its outsized rotating globe. Displaying three time zones along with a universal time function, this exceptional timepiece is distinguished by its three-dimensional architecture created with extreme attention to fine craftsmanship.
With its open architecture offering superb visual access to the mechanism, the movement of the Double Tourbillon 30° is hand-wound. It has a 120-hour power reserve guaranteed by four fast-rotating coaxial barrels.
With its four tourbillons, each independently contributing towards optimal timekeeping precision, the Quadruple Tourbillon features an asymmetric case. The technical performance delivered by an innovative spherical differential is expressed subtly in a contemporary style.
QP à Équation
At the heart of the QP à Équation lies Greubel Forsey’s seventh invention, the Mechanical Computer, an entirely integrated 25-part component that brings a totally new interpretation to some of the calendar functions incorporated in age-old astronomical clocks. It is composed of a set of coding wheels superimposed in a coaxial manner, along with removable fingers programmed by this ingenious system.
In creating the Balancier Contemporain, a white gold 33-piece limited edition, Greubel Forsey imagined providing a particularly compact showcase for its exclusive balance-wheel system. Creating such a moderately-sized new movement and dial imposed the challenge of maintaining well-balanced forms and pleasing proportions, along with clear legibility and cutting-edge performance.
Robert Greubel and Stephen Forsey first unveiled their invention at Baselworld 2008 as part of the EWT Laboratory and then presented a more advanced version of a technical demonstrator at SIHH 2010. Since then, further exciting paths have been explored to help optimise accuracy in this new timepiece. The Différentiel d’Égalité enables steady distribution of power from the mainspring barrel to the regulating organ, which maintains a constant balance amplitude during the 60 hours of the power reserve.
Stemming from fundamental research into the inclination of oscillators and escapements, the Double Balancier offers a significant approach to improve chronometric timing performance for the timepiece, both on and off the wrist