Louis Breguet (1880-1955)Developed a keen interest in aeronautics, conquering the air in 1907 in his gyroplane, the first helicopter in the world to carry a passenger. Soon afterwards, the "Louis Breguet" aircraft company was established. Meanwhile, the Breguet watchmaking firm began producing watches for pilots and aircrafts. "Montres Breguet" therefore introduced chronographs with registers and tachometric scale. Among their first clients were the American Air Force in 1918 and the "Louis Breguet" aircraft company in922. The number of clients soon increased, particularly in the fifties.The chronograph wristwatch Type XX, launched in 1954, became the most successful and most famous post-war aviator's watch. Though at first these watches were strictly intended for the air forces, in the 70's Breguet launched the second generation, intended for civilian use. Breguet's third generation of Type XX Aéronavale is now on the market. The Type XX chronograph features the "retour en vol", or "instantaneous fly-back" device. This function, highly appreciated by pilots and aeronautical autorities, was incorporated in all Type XX models and in chronographs to be fitted in aircraft dashbards. The retour en vol device is a great time-saver, reducing three actions to one, since it allows the chronograph hand to return to zero by simply depressing the lower push-button. Consequently, the chronograph hand, back at zero, can restart immediately.