Since founding their unique watch company in 2004, Robert Greubel and Stephen Forsey have created an indelible footprint, instantly recognisable and firmly imprinted on the world of watchmaking. In the space of just one decade Greubel Forsey have become a benchmark watchmaker, and every move they make is followed keenly by collectors and other watchmakers alike.
The Greubel Forsey GMT Black is fundamentally identical to the precious metal versions of the GMT, except for the case. Made of lightweight titanium and coated with a glossy black amorphous diamond-like carbon (ADLC) layer, the case has the same chunky dimensions as before, at 43.5 mm wide and 16.14 mm high.
The movement has been finished with a black coat in on the bridges to match the case, making the blued steel screws and gilded components even more prominent. Functionally the GMT Black works the same as its siblings: the globe indicates day or night for the second time zone sub-dia at 11 o’clock, which can be advanced in one hour steps by the button just beside it on the case band. The cities disc on the rear is synchronised with the globe on the front, indicating the time in all 24 time zones around the world. And the tourbillon is inclined at 25 degrees, rotating at a high speed of one revolution every 24 seconds (conventional tourbillons make one round every minute). According to Greubel Forsey this compensates for the effects of gravity more effectively than a standard tourbillon.
