Building on the Twin Turbo concept, design and movement, Twin Turbo Furious Sapphire Crystal is Jacob & Co.'s wildest expression of speed and mechanical beauty. Twin Turbo Furious Sapphire Crystal is as desirable, performance-driven and exhilarating as a supercar. Its three-dimensional and curvy shape has no equivalent. Its entire case is one of the most elaborate pieces of sapphire ever crafted. Like a windshield, it's curved, long, wide and offers a 360°-viewpoint on the inside of Twin Turbo Furious Sapphire Crystal : a high complication mechanical engine. Born in the world of racecars, Twin Turbo Furious features the most racetrack-inspired of all complications. Its chronograph comes with an in-house pitboard indicator. It allows to compare up to 5 consecutive lap times, showing each time difference, be it time gained or lost. Twin Turbo Furious has the shape, details, functions and spirit of a racing machine. Crafted out of solid transparent sapphire, the Twin Turbo Furious Sapphire Crystal is the ultimate technical expression of the Twin Turbo Furious. Each one of these spectacular pieces of high watchmaking is a one-off achievement, the result of the utmost craft and skills.