Electromechanical multirange 72×72 timer. With a rotating index that points out the passing time. Time setting by rotation of the large knob. Manual reset. On the side of the timer , it is available a mechanical gear-set to change the full scale time. The timer starts with the power supply to the sinchronous motor.

At the end of the time the two switches switch. The reset is made by the button on the knob.

Octal socket .