Inspiration for the GMT Sport came from the GMT Black that Greubel Forsey launched in 2015. This time, the brand has developed a robust case in lightweight titanium in a form that breaks with convention: perfectly round when seen from above, viewing from other angles reveals an ovoid bezel and an arched profile flowing into the lugs. Proposed as a limited edition of 11 pieces, all water-resistant to 100 metres, this is the first time Greubel Forsey has billed one of its timepieces as a true sports watch. The movement has been designed specifically for the case, and incorporates a patented suspended hours and minutes display. This architecture creates a wonderful showcase for the 24-second inclined Tourbillon at 2 o'clock, across from the terrestrial globe that gives universal time. Indications are completed by an auxiliary dial between 10 and 11 o'clock for small seconds and a second time zone, plus a power-reserve display. Turning the watch over reveals a city disc along with two rings for an intuitive read-off of UTC universal time plus summer time in the 24 cities of the major time zones.