Greubel Forsey Quadruple Tourbillon Watch
The four tourbillon movements are separated into two cages. Basically, each cage has a tourbillon within a tourbillon. A spherical differential takes all that power and transmits it to the movement in order to tell the time. There is a video located at Greubal Forsey's website showing what is hard to describe in words. The complex movement is manually wound and housed in a 43.5mm wide 18k rose gold case (which has side sapphire windows for more visuals into the movement. The watch dial is made of blackened gold, while the functions include the time with hours, minutes, seconds, and a power reserve indicator (nicely integrated into the subsidiary seconds dial. The larger tourbillon cage has a ring with numbers up to 240. This represents seconds, and counts 4 minutes; the time it takes the large tourbillon cage to make one revolution. Look for the official release at Baselworld soon.
Ariel Adams publishes the watch review site aBlogtoRead.com.