Functional model to assemble.\nThe mechanism of this clock is based on a drawing sketched by Leonardo da Vinci.\nThe clock uses the weight of the pendulum as a source of energy. The power depends on the design of the pendulum turning horizontally. The speed of the clock is controlled by the weight and the balance of the pendulum. The functional clock can be mounted hanging on a wall or on its base as in the photo.\nLeonardo da Vinci was an Italian artist and scientist, born during the Renaissance and appreciated as the most brilliant inventor and \"industrial\" designer of his time. His work was a pioneer in many aspect of technology and modern science.\n