In their quest to take the tourbillon concept to new levels of precision, the designs of Robert Greubel and Stephen Forsey are advanced interpretations of concepts developed by Abraham-Louis Breguet himself.
The Greubel Forsey Double Tourbillon 30 Degrees is undoubtedly one of the most technically complicated wrist watches ever created. Comprised of a one minute tourbillon within a four minute tourbillon, the former is inclined at an angle of 30 degrees effectively negating the error produced by the pull of the earth on the balance - the result being one extremely accurate timepiece. The 39 jewel movement, called the GF 02, uses two spring barrels and has a power reserve of 72 hours.
The double tourbillon mechanism occupies much of the lower half of the skeletonized dial of the Double Tourbillon 30 Degrees, four curved 'hands' rotate with the outer four minute tourbillon as each has its turn at marking the passing of one minute on the arc shaped minute track. There's a power reserve indicator in retrograde at 3 o'clock and a seconds subdial at 9.
The level of finishing on the movement, dial, and case of the Greubel Forsey Double Tourbillon 30 Degrees is something to behold. I'm not sure if it knows any equal in the world of haute horology - truly superb is the only way to describe it.
The case itself is 43.5mm across and almost 16mm thick. Of course, there's a sapphire crystal display back and the view from the reverse is quite riveting as well.
In platinum, the Double Tourbillon 30 Degrees is $425,000 US - red or white gold versions are $360,000. He who hesitates may be lost as the messieurs Greubel and Forsey have a quadruple tourbillon in the works.
