In 2011, Greubel Forsey revolutionized the field of watches with a GMT timepiece pioneering technical, artistic and ergonomic point of view. Its exceptional chronometer movement with a tourbillion 24 seconds inclined at 25 ° is now set in a platinum case.
Reference to “Greenwich Mean Time”, the time reference meridian, the acronym GMT means in the watch making vocabulary, indicating a second time zone. Animated by a spirit of inquiry, Robert Greubel and Stephen Forsey have gone far beyond the conventional view of a spindle in a window or using a needle, including their timepieces globe performing a rotation complete in 24 hours in the counterclockwise watch, that is to say which borrows our planet.
This planisphere materializes time in real time, from the point of view of the North Pole towards which they converge. One look you can pick them all. It is 12 in the UK. This is the beginning of the afternoon in Rome or Geneva. Sunlight soon awakens the East Coast of the United States, while the East is plunged into darkness. This first contact with the timekeeper calls already now a poetic journey transcontinental. Greubel Forsey’s GMT is more than a watch. It turns out a portable time card.
An opening in the housing side window offers a view of the southern hemisphere. If the South Pole does not appear, is that it is the anchor point on earth that has a flywheel mechanism pivoting. The choice of Greubel Forsey has focused on titanium, worked here in three dimensions with extreme precision to represent the continents on a smaller scale.
The globe has a prominence at 8:00 am, while the tourbillion 24 seconds is placed at 5:00 am in a second protuberance. The platinum case has a third in 1 hour: Hourly basic information has been compiled in this upper part of the dial side, with a small waterfall and a second 2 hrs reserve indicator at 3 o’clock. Found at 10:00 am GMT display for a second time zone.
The back of the timepiece appears universal time that is 24 hours time, as a true record of world time. It slips away the names of 24 cities, and a display differentiated cartridges DST (for cities under this regime) is in a particularly legible. Ultimate wink, a Sun at the peak hours of the world illuminates the back of the case, leaving the front of the stage to the Earth.
Naturally, and there also recognizes the “signature Greubel Forsey”, particular attention is paid to the decoration of components down to the smallest details. The hand finishing disclaim full range of traditional techniques of graining to chamfering, through shades of polishing, lapping, lines drawn in black polished blocked. The curved glass, bottom and side window are sapphire. The hand-sewn black alligator strap with platinum folding clasp. This is a beautiful demonstration of know-how at the service of the craftsmanship.
GMT gauge is powered by two barrels providing a range of 72 h to frequency 21,600 alternations / hour. The caliber has 443 components. It is equipped with a tourbillion escapement 24 seconds inclined at 25 °, consisting of 87 components weighing a total of 0.36 gr.
In addition to its timekeeping properties and reliability, this exhaust block was selected for its small size, which keeps a template with a diameter of 36.40 mm (16 ½ lignes). This allows a new housing to medium size, 43.5 mm wide and a total height of 16.14 mm. Made of platinum 950 unalterable, it has a slightly lighter than the previous version in white gold hue.