A classic electrostatic machine capable of generating electrical voltage and electric charges of different signs (positive and negative), which are separately collected in Leyden jars (two distinctive containers). The machine allows for safe electrostatic experiments. It features a crank-operated belt, adjustable spark length, and two high-voltage capacitors (Leyden jars). The wooden base measures 35 x 20 x 3 cm. Height: 40.5 cm. Disc diameter: 30 cm. The machine is like new, never used. Long and very visible spark!