The 57.8 x 44.4mm fully transparent blue sapphire case of the latest JacobandCo Bugatti Chiron Tourbillon provides a complete view of the JCAM37 manual wound caliber of the BUGATTI Chiron, including the groundbreaking fully-working replica of a W16 engine. The clarity of the case is the result of high-end machining and hand polishing. The blue hue is created through a proprietary mixture of minerals and metals, which makes the sapphire more difficult to heat, machine and polish, but the result is more than worth the effort. #BUGATTI #BUGATTIChiron #JacobandCo #JacobandCoWatches #HauteHorlogerie #CHIRONTourbillon