At Baselworld 2014 Bulgari (Bvlgari) quietly introduced two ultra-thin versions of the Octo collection that has been a mainstay of their focus for a few years now. The Octo Finissimo is incredibly thin and something I think many people will enjoy.
For example the movement in the Octo Finissimo Tourbillon is over a millimeter thinner than the movement in the Arnold & Son UTTE. The UTTE’s movement was 2.97mm thick while the Bulgari caliber is a scant 1.95mm thick. Further, the UTTE case is 8.34mm thick, while the Octo Finissimo Tourbillon is claimed to be just 5mm thick. It really does feel like a wafer on the wrist while the strap feels thicker than the case.
The movement is rather impressive for all that slimness. It is made up of 249 parts, operates at 3 Hz, and has a power reserve of about 55 hours. One of the major ways that the movement was made to be so thin was the use of ball bearings in much of the places where other types of components may have been traditionally used. –ablogtowatch