Limited to 88 pieces worldwide.
The openworked automatic flying Tourbillon can be distinguished by its micro-rotor, which is visible on the dial side.
Charcoal dial- white transferred roman numerals 
Onyx plates - Tourbillon at 7 o’clock 
Micro-rotor aperture at 10 o’clock 
Black flange with minute-circle transfers and appliques 
Functions: Hours, minutes, Tourbillon carriage at 7.30 o’clock - finely adjusted in six positions 
Movement: automatic flying Tourbillon Caliber RD520
60 hour power reserve
Water resistant to 50 meters / 165 feet