Independents

Press Release Quadruple Tourbillon à Différentiel Sphérique 5N red gold case with lateral window, black dial Quadruple Tourbillon à Différentiel Sphérique Mechanical hand-wound movement, Calibre GF03 Quadruple Tourbillon, seconds indicator and power-reser...  

is covered by tourbillon view or air. That's some mighty expensive air-space er......what is a spherical differential for us with under-developed right brains? Regards, MTF

Regardless of any practical use or scientific evidence on the accuracy of a tourbillon, I really admire these guys for their technical skills. The fact they can build more than one is even more amazing. 1.7g for the cage weight. Talented and crazy. Hope t... 

I WOULD LIKE TO SEE A WATCH WITH EIGHT TOURBILLONS.