Greubel Forsey’s Striking Blue GMT Quadruple Tourbillon

Greubel Forsey’s Striking Blue GMT Quadruple Tourbillon

Greubel Forsey creates the next chapter for the GMT Quadruple Tourbillon with an 11-piece edition of this groundbreaking timepiece in Titanium with striking blue accents.

The GMT Quadruple Tourbillon is radical in all its aspects. First of all, by its construction – the Quadruple Tourbillon is Greubel Forsey’s second Fundamental Invention – which averages out positional errors due to gravity in all situations, especially in stable wristwatch positions.

To achieve this, the original tourbillon has been elevated to realise its full potential: inclined at 30°, doubled and then quadrupled. The result, two synchronised Double Tourbillon 30° mechanisms, where a first cage, inclined at 30° and rotating in one minute, is nested within a second horizontal cage, completing a full rotation in four minutes.

With this exclusive limited edition in titanium with striking blue accents, Greubel Forsey offers an unexpected alternative to the precious metals that High-end watchmaking traditionally favours. Titanium has numerous qualities: it is both stronger and lighter than steel, while also being extremely resistant to corrosion and magnetic fields.

The circular-grained hour ring with polished bevels and 72-hour chronometric power reserve indication appear for the first time in a brilliant blue. The mainplate is now frosted and spotted with polished bevelling, countersinks and straight-grained flanks, executed in a grey finish.

Planet Earth, set near eight o’clock, shines in a new light with the blue livery. An original Greubel Forsey creation from ten years ago (2011), the rotating terrestrial globe allows for the simultaneous display of several different time zones: on the dial side, with a 24-hour ring around the Earth, for Day/Night indication and on the caseback side, displaying 24 major cities their respective time zones while distinguishing between those which use summer time (on a light coloured backdrop), and those which do not (on a dark backdrop).

Technical Specifications:

GMT Quadruple Tourbillon 
11 pieces in titanium 
Hand-wound movement with 3 patents 

GMT • 2nd time zone • rotating globe with universal time and day-and-night • universal time on 24 time zones • cities observing summer time • lateral window showing the equator and southern hemisphere • GMT pusher • Quadruple Tourbillon • hours and minutes • small seconds • power-reserve


• Movement: 705 parts 

• 84 
• Olived-domed jewels in gold chatons 

• 72 hours 

• 21’600 vibrations/hour 

• Inner tourbillons inclined at a 30° angle, 1 rotation per minute 
• Outer tourbillons: 1 rotation in 4 minutes, 1 gold counterweight per double cage bearing the individual number of the timepiece 


• In titanium with asymmetrical convex synthetic sapphire crystal 

• Diameter: 46,50mm 
• Height : 17,45mm 

• Multi-level in gold, anthracite colour 
• Gold hour-ring and power reserve 
• Gold hour markers 

• Rubber or hand-sewn alligator 
• Titanium folding clasp, engraved with the GF logo 

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