Greubel Forsey New GMT Sport


Greubel Forsey New GMT Sport

The new GMT Sport

The art of the essential
La Cote des Montres - April 6th, 2021

The GMT Sport emerges in a bold new character of titanium and blue. More ergonomic and contemporary than ever, this GMT Sport is the very first Greubel Forsey creation with a completely integrated metal bracelet. With a new bezel and new finishes, this limited edition is an exciting evolution that just 33 collectors will have the opportunity to discover first hand.


A play of light
and shade


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.


The first
metal bracelet

in the history
of Greubel Forsey 

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.

A renewed spirit


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. The central suspended arched bridge as well as the tourbillon bridge are openworked 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 42 mm case diameter (45 mm 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.


A highly technical movement


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).

The new GMT Sport
A bold aesthetic choice from the Atelier, signed Greubel Forsey

Greubel Forsey
New GMT Sport

Limited edition
Technical description

Movement :Blue and hand-wound movement with 3 patents
Patents pending
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
Diameter:36.90 mm
Thickness:13.18 mm
Components :435
Tourbillon cage :88 parts
Weight of the cage:0.38 g
Number of jewels :63
Olived-domed jewels in gold chatons
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, straightgrained flanks, blue treatment
Multi-level, openworked and polished suspended-arch bridge, polished bevelling and countersinks, straight-grained flanks
Openworked 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
2nd time zone GMT
Movement side :24 time zones universal time
Summer time
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”
Caseband diameter :42.00 mm
Bezel diameter :45.00 mm
Case height :15.70 mm
Height on synthetic sapphire crystals:17.80 mm
Water resistance :10 atm - 100 m - 328 ft (standard NIHS 92-20/SN ISO 22810:2010)
Crown :Titanium and rubber with GF logo
Colour-coded rubber capping, interchangeable
Dial 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
Bracelet :Rubber with text in relief, titanium folding clasp, engraved GF logo
Bracelet :3-row metal bracelet in titanium, folding clasp with integrated fine adjustment, engraved GF logo