The winding device includes a motorization device for driving a watch holder carrying at least one automatic watch with a mobile oscillating mass, and a measuring device for measuring the variation in the resistive torque opposed to the motorization device by the watch holder equipped with watches, depending on the degree of winding of the watches. The measuring device includes a speed measuring device to determine the speed and/or the variation in the speed of the motorization device, and/or include a torque measuring device to determine the value of the torque and/or the variation in the torque at the watch holder, and/or include a current measuring device to determine the value of the current and/or the variation in the current of an electric motor of the motorization device.

A winding device includes a motor for driving a watch holder carrying at least one automatic watch with a mobile oscillating mass, and a multimeter for measuring a variation in a resistive torque opposed to the motor by the watch holder equipped with watches, depending on a degree of winding of the watches. The multimeter includes a speed meter to determine a speed and/or a variation in the speed of the motor, a torque meter to determine a value of a torque and/or a variation in the torque at the watch holder, and/or a current meter to determine a value of a current and/or a variation in the current of an electric motor.

A self-winding watch includes a movement connected to a winding device of a barrel spring including an oscillating weight pivoting around an axis A, a reduction wheel train cooperating with the oscillating weight to transmit the torque to the barrel, a storage unit for electrical energy, a photovoltaic cell arranged to receive the ambient light and charge the electrical energy storage unit, a control circuit connected to the terminals of the electrical energy storage unit and a driver connected to the circuit and coupled to the oscillating weight to displace it. The electrical energy storage unit, the control circuit an d the driver are integrated to the oscillating weight.

The invention relates to a self-winding watch comprising a movement connected to a winding device of a barrel spring comprising an oscillating weight pivoting around an axis A, a reduction wheel train cooperating with the oscillating weight to transmit the torque to the barrel, a storage unit for electrical energy, a photovoltaic cell arranged to receive the ambient light and charge the electrical energy storage unit, a control circuit connected to the terminals of said electrical energy storage unit and drive means connected to the circuit and coupled to the oscillating weight to displace it. According to the invention the electrical energy storage unit, the control circuit and the drive means are integrated to the oscillating weight.