The Art Of The Essential With Greubel Forsey’s GMT Sport

The Art Of The Essential With Greubel Forsey’s GMT Sport

Greubel Forsey’s GMT Sport is their very first 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.

Taking centre stage for the first time on the GMT Sport, the distinctive Greubel Forsey bezel now subtly relieved of the 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 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.

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.

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 patented invention which executes a complete rotation in 24 hours, universal time can be read easily, quickly and intuitively.

Technical Specifications:

GMT Sport
In titanium, blue movement
Limited edition
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

• 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)

• 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

• Inclined at a 25° angle, 24-seconds rotation
• Light alloy cage pillars
• Titanium cage bridges
• Gold counterweight

• 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.

• 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
• Summer time


• 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 of the case
• Water-resistant 10atm – 100m – 328ft (standard NIHS 92-20/SN ISO 22810:2010)

• 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

• 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

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