Small secondary source of power, a weight or spring, which runs a timekeeping mechanism and is itself periodically rewound by the timepiece's main power source, such as a mainspring
pequeña fuente secundaria de energía, un peso o resorte, que acciona un mecanismo de cronometraje y es a su vez recargado periódicamente por la fuente de energía principal del reloj, tal como un resorte motor (es)
small secondary source of power, a weight or spring, which runs a timekeeping mechanism and is itself periodically rewound by the timepiece's main power source, such as a mainspring (en)