Self-winding mechanical movement of manufacturing P-331 caliber with turbine: 42 hours of power reserve, 25 jewels, and 28,800 vibrations per hour. 48 mm diameter titanium case with black PVD steel bezel and case back. Anti-reflective sapphire crystal. Black dial with stenciled indexes and red inserts that give it a sporty character. At the center of the dial is a second rotor that incorporates a combination of apertures and spokes that represent a turbine propeller that rotates with the slightest movement of the wearer. The caseback secured by 6 screws leaves the finely decorated Perrelet P-331 caliber proudly exposed behind crystal. Original black rubber strap with titanium pin-buckle.