Gübelin

Rolling-clocks appeared as early as the end of the 15th century. Here is one of the few models still in (limited) production The movement of the clock along the incline provides the driving power. A counterweight connected to the movement by a gear system, prevents the clock from sliding down the incline and maintains its equilibrium. Five times per second, the equilibrium suffers interruptions during which the clock moves 17 hundred-thousandths of a millimetre. The dial remains in the same position throughout. A hand shows the date and the day of the week is indicated on the base. (GUBELIN)