With a central tourbillon at a 90° angle to the vertical axis, the watch stays in a horizontal position most of the time. ˘ Manual winding movement ˘ 3D structure skeleton dial ˘ Two barrels ˘ 90° angle central tourbillon ˘ 100 hours power reserve The frame of the adjustment mechanism rotates on its own to counteract the influence of gravity on the balance wheel. Diameter: 44 mm (excluding crowns) Thickness: 19.9 mm Glass surface: Anti-reflective crystal glass on dial and case back Water resistance: 3 ATM (30 m-100 ft) Material: Brown leather strap Clasp: Folding clasp Hour/minute hands: exclusive 3D design, polished edging 5mm power-reserve sphere with microbill finish Retrograde jumping hours/Retrograde sweeping minutes/Seconds on the tourbillon cage/Power reserve Movement: Hand-winding movement, Number of parts: 344 Frequency: 3 Hz Number of vibrations per hour: 21,600 Balance wheel: Variable-inertia balance wheel The barrel: Two parallel barrels Power reserve: 100-hour Slightly curved sunray pattern, polished and opaque, sandblasted effect, grey NAC galvanic treatment on the surfaces.