Weighted clock with pendulum oscillator beating the average time, with anchor-type escapement at rest, brass and steel wheel and electrical contacts to record the second on a chronograph and possibly to synchronize another clock. The compensation is mercury, contained in a glass container placed at the end of the pendulum rod, where the electrical contacts are also placed; these, with each swing of the rod, affect an electromagnetic system, placed on the internal wall of the cabinet, which, controlled by a regulating clock, allows the clock to synchronize.