MANY DISPLAYS These cosmetic changes haven ’ t altered the globe ’ s dramatic time display . The Earth is surrounded by a fixed 24-hours ring around the Equator . This ring displays local time for all the longitudes and takes into account the day / night with an indicator . A peek through the side of the case , through a sapphire window adjacent to the globe , reveals a clear view of the Equator and the southern hemisphere .
Beyond the new livery , the latest Greubel Forsey GMT Quadruple Tourbillon remains a feast for the eyes . The multilevel , three-dimensional dial offers the main hours and minutes subdial at the highest point ( between 1 o ’ clock and 2 o ’ clock ), with the coaxial small seconds and second time zone at 4 o ’ clock forming the second highest point .
You may recall that each Double Tourbillon 30 ° features a first cage rotating in one minute and angled at 30 °, fitted inside a second upright cage that rotates once in four minutes . Greubel Forsey explains that the combination of the inner cage inclination and the different rotational speeds of the two cages cancel any timing variations . A spherical differential transmits the average timing rate of all four of the tourbillon cages , improving their chronometric performance .
The back of the watch also delivers both awe and information . Universal time can be spied , with a fixed 24-hour scale showing day and night zones and a disk with abbreviations of twenty-four cities . The same disk also distinguishes between the time zones that utilize Daylight Saving Time and those that don ’ t .
Greubel Forsey plans to make eleven examples of this new titanium-cased GMT Quadruple Tourbillon , each priced at 760,000 Swiss francs . The watch will be made , eventually , as an edition of sixtysix examples .
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