The haute horology brand Greubel Forsey has unveiled GMT Earth with a 3D view of the terrestrial globe that is a hallmark of the GMT watch that it is based on.

The watch offers 3D views of the terrestrial globe

The GMT watch, last seen in a titanium black edition at SIHH 2014, now returns with a completely new promise. By reproducing the Earth's rotation in real time, this timepiece offers an intuitive view of time all over the world and a day/night indication.

The remit of the design team was to ensure a 3D view of earth, from the North to the South Poles. The whole architecture of this timepiece was focused on giving the movement and the case a more prominent role.

The caseband has a lateral window to view the globe

The watch has a striking 45.5 white gold case with a caseband that is engraved with text that encapsulate the key values of the brand. The proportions of the case were constructed to accommodate the high-domed sapphire crystal bezel and features a lateral window on the caseband to view the earth.

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Revealing the entire terrestrial globe required complex application of sapphire crystal. The GMT Earth enables a clear view of three time zones simultaneously to within a quarter of an hour. The caseback displays the 24 time zones with summer and winter times like the old GMT models but instead of the engraved sun, a sapphire window that offers glimpses of the earth globe again.

The caseback displays 24 time zones with summer and winter times

The rotating globe with day-and-night UTC indicator in synthetic sapphire is a striking presence on the dial. A multi-level hour-ring in synthetic sapphire is used to indicate time and features engraved galvanic growth hour indexes and lacquered minutes and small seconds.

A triangular GMT indicator sits at the 10 o’ lock on the dial and a power reserve indicator sits bit below the hour ring. The familiar 24 second tourbillon sits inclined on the lower part of the dial. The watch is limited to 33 pieces and is priced at CHF610,000.