From Girard-Perregaux a new interpretation of the Tourbillon Bi-Axial in a tantalum case. The Tourbillon Bi-Axial tantalum with sapphire bridges (ref. 99810-81-000-BA6A) is a limited edition of just 12 pieces.
The three bridges are cut in sapphire with a metallic black finish that accentuates their volume.
The tourbillon bi-axial mechanism is made of gold, steel, glucydur and grade-five titanium and despite of its 110 parts, it only weighs 0.8 grams. Visible from both sides of the case, the bi-axial rotation of the tourbillon is hypnotic. The internal cage bearing the balance, balance spring and escapement completes one turn on its axis in forty-five seconds while the external cage completes one revolution in one minute and fifteen seconds on a second axis.
The manually-wound movement beats at 21.600 alternations per hour and offers 70 hours of power reserve.
The case has a diameter of 45 mm and is water resistant to 30 meters.