Unveiled during the Watches and Wonders Digital exhibition in April 2021, this new GMT Sport watch in titanium is the first Greubel Forsey creation with a completely integrated metal bracelet. With a new bezel and new finishes, this spectacular timepiece comes in a limited edition of just 33 pieces.
Taking centre stage for the first time on the GMT Sport, the distinctive Greubel Forsey bezel now subtly relieved of the relief engraved key values, takes on a completely new profile.
With hand-finished horizontal straight-graining on top and the hand-polished contour and flanks taking on a soft yet striking new form, the bezel is beautifully refined, opening up the dial to attract even greater focus to the essential – the Greubel Forsey movement and hand-finishing, a characteristic of every timepiece.
This new finish highlights the unique profile of the GMT Sport’s bezel, an ellipse that gently curves at 12 o’clock and 6 o’clock to hug the contours of the wrist – a passion for perfect ergonomics that reaffirms the contemporary, everyday style of this exclusive timepiece.
This ergonomic design is further pursued in the new bracelet of this GMT Sport – the first ever metal bracelet on a Greubel Forsey creation. Entirely conceived in the Atelier and specifically for this timepiece, it is fully integrated into the case of the GMT Sport and profiled to seamlessly follow the elliptical shape of its case and bezel.
Faithful to its tradition, Greubel Forsey has devoted particular attention to finishing with three distinct styles distributed over both the lateral and central links: straight graining, frosting and hand-polished bevelling.
For example, frosting was chosen to echo the finish of the lugs, underlining the aesthetic continuity between the case and bracelet. The latter, made of Grade 5 titanium, is lightweight, robust and very strong. It features a fine adjustment system, providing the valuable millimetres of play to allow the wearer to choose between a loose and casual or a snug, wrist-hugging fit.
As for the movement, this new GMT Sport is the first in a unified colour: the mainplate, bridges, globe, second time zone dial and 24-second indicator ring of the Tourbillon 24 Secondes at 1 o’clock are all in the same blue finish. Both the central suspended arched bridge and the Tourbillon Bridge are open-worked to highlight the three dimensional movement architecture of its intense blue finish.
The choice on the one hand of a deep, matte blue and on the other, the polished components in titanium (bridges, globe) or steel (hands, power reserve) accentuate the strong contrasts within the movement itself and ensure perfect legibility.
Thanks to its 42mm case diameter (45mm on the bezel), the expression of the movement’s technicality is perfectly harmonious with the intuitive central hours and minutes display, second time zone at 10 o’clock, power reserve at 3 o’clock and rotating terrestrial globe at 8 o’clock.
With this new livery, more essential and refined than ever, Greubel Forsey offers a new means of expression to two of their signature creations. Their 3rd invention, the Tourbillon 24 Secondes is positioned between 12 o’clock and 2 o’clock. With its cage inclined at a 25° angle and completing a full rotation in 24 seconds, the Tourbillon 24 Secondes provides superior chronometric performance – in addition to the truly unique visual effect.
Then, the terrestrial globe placed between 7 o’clock and 9 o’clock. More than any other, it embodies the three-dimensional time display championed by Greubel Forsey. Thanks to this invention which executes a complete rotation in 24 hours, universal time can be read easily, quickly and intuitively.
Seen from above the North Pole, a ring with 24- hour markings allows the local time to be read for all longitudes while also acting as a day/night indication.
On the caseback side, a disc displaying city names surrounded by 2 rings allows the wearer to read UTC Universal and Summer Time for 24 cities in 24 major time zones. It also distinguishes those time zones applying summer time (on a light background) from those who don’t (on a dark background).
Technical details
Model: Greubel Forsey GMT Sport with Integrated Metal Bracelet
In titanium, blue movement
Limited edition
Movement
Hand-wound movement with 3 patents • Patents pending
GMT • 2nd time zone • rotating globe with universal time and day-and-night • universal time on 24 time zones • summer and winter time • cities observing summer time • GMT and Earth pushers • Tourbillon 24 Secondes • hours and minutes • small seconds • power-reserve
Movement dimensions
Diameter: 36.90mm
Thickness: 13.18mm
Number of parts
Movement: 435 parts
Tourbillon cage: 88 parts
Weight of the cage: 0.38g
Number of jewels
63
Olived-domed jewels in gold chatons
Chronometric power reserve
72 hours
Barrels
Two coaxial series-coupled fast-rotating barrels (1 turn in 3.2 hours), one of which is equipped with a slipping spring to avoid excess tension
Balance wheel
Variable-inertia with gold mean-time screws (10mm diameter)
Frequency
21’600 vibrations/hour
Balance spring
Phillips terminal curve
Geneva-style stud
Bridges and main plate
Titanium
Frosted and spotted, polished bevelling and countersinks, straight-grained flanks, blue treatment
Multi-level, open-worked and polished suspended-arch bridge, polished bevelling and countersinks, straight-grained flanks
Open-worked flat black polished tourbillon bridge, spotted, polished bevelling and countersinks, straight-grained flanks
Tourbillon
Inclined at a 25° angle, 24-seconds rotation
Light alloy cage pillars
Titanium cage bridges
Gold counterweight
Gearing
Involute circle profile
Tangential inclined gear on fixed wheel and on escape wheel pinion
Inclined gear and profiled teeth on intermediate wheels of the sethands mechanism.
Displays
Hours and minutes, on suspended-arch bridge
Small seconds on disc
72-hours power reserve on a sector
24-seconds tourbillon rotation
Rotating titanium globe with universal time
Day-and-night
2nd time zone GMT
Movement side: 24 time zones universal time and Summer time
Exterior
Case
Titanium with curved synthetic sapphire crystal
Three-dimensional, variable geometry-shaped bezel, hand-polished with hand-finished straight graining
Profiled lugs, screwed fixing
Engraved pushers
Transparent back with high domed synthetic sapphire crystal
Titanium security screws
Raised engraving “GMT Sport” and “Greubel Forsey”
Case dimensions
Caseband diameter: 42.00mm
Bezel diameter: 45.00mm
Case height: 15.70mm
Height on synthetic sapphire crystals: 17.80mm
Water-resistance: 10atm – 100m – 328ft (standard NIHS 92-20/SN ISO 22810:2010)
Crown
Titanium and rubber with GF logo
Colour-coded rubber capping, interchangeable
Dial
Front side
Three-dimensional, variable geometry hour-ring, with luminescent hours and minutes indexes
GMT indicator with raised engraving
Power-reserve indicator, engraved and lacquered
Tourbillon rotation indicator in gold
Rotating globe with fixed day-and-night UTC indicator in synthetic sapphire, engraved and lacquered
Movement Side
Synthetic sapphire disc displaying city names surrounded by 2 rings (UTC engraved on the case / Summer time engraved on a gold movement plate, lacquered and hand matt-lapped)
“Summer time” plate with limitation number, raised engraving, hand matt lapped
Hands
Hours and minutes, curved profile, polished steel with Super-Luminova
2nd time zone GMT indicator, grey triangle
Small seconds, fixed red triangle
Power-reserve indicator, in polished steel
Aluminium 24-seconds double-tipped hand, black treatment
Strap and clasp
Rubber with text in relief, titanium folding clasp, engraved GF logo
3-row metal bracelet in titanium, folding clasp with integrated fine adjustment, engraved GF logo
