Introducing Greubel Forsey GMT Earth Final EditionBy Revolution
Launched at Geneva Watch Days 2021, and limited to just 11 pieces, Greubel Forsey unveils its third and final signature watch, a new interpretation of its GMT Earth series, originally introduced in 2011 and previously forged from white gold and platinum.
Third time around the new 117g titanium case is adorned with an intense black finish. The sleek, dark good looks of the new piece comes on an all-black natural rubber strap. The blackened finish on the dial and movement also extends to the bottom plate and frosted bridges.
The weight of the strap has been reduced by two-thirds while the case has lost just over a third of its weight.T itanium was chosen for its resilient lightweight qualities, a metal impervious to temperature variations. It’s also non-magnetic, hypo-allergenic and eight times stronger than gold or platinum. It requires however, a great deal of technical know-how to work with.
Packed within its 45.5mm dial, GMT Earth offers literally a whole world of mechanical complications. With off-center hours, minutes and seconds display, these first two feature large open-worked hands finished with a Super-LumiNova tip, while there’s a small seconds hand on a sapphire disc at three o’clock.
On the left is the GMT indicator, highlighted by a red hand which easily stands out against a hand-engraved black gold disc filled with lacquer.
Located opposite the crown on the right is the power reserve, a black, engraved gold segment, filled with lacquer and covered by a silver-polished steel hand.
Catching the eye between7 o’clock and 9 o’clock, is the three dimensional Earth occupying the largest space, completing, as in reality, a full rotation every 24 hours. The engraved sapphire crystal ring around the equator acts as a day/night indication. You can tell at a glance which part of the hemisphere is in daylight and which is at night.
On the side of the caseband, a window opens to show the equator enabling the earth to be viewed from all angles. Finally, there’s the world time display indicator on the caseback. 24 time zones indicate the UTC of 24 major cities. Those that observe daylight savings are indicated on a white background.
The Tourbillon 24 Secondes located at 5 o’ clock is set at an angle to resolve the positioning problem in relation to gravity. The 25° angle and the rapid rotation of the tourbillon cage improves the chronometric performance of a system using only one tourbillon.
When Robert Greubel and Stephen Forsey first launched Greubel Forsey in 2004, they were told every possible complication worthy of the name had already been invented for watches and there was nothing they could add to it. However, GMT Earth’s remarkable three dimensional globe within a watch dial displaying day and night in real time has made this series a tour de force of watchmaking something akin to the 8th wonder of the world.
Limited edition: 11 pieces
Functions: GMT, Second time zone, GMT pusher, Tourbillon 24 Secondes, Hours, Minutes, Small seconds, Power-reserve, Rotating globe with universal time on 24 time zones
Power reserve: 72 hours
Strap: Black natural rubber