Didactic model from the 1950s about generating energy using a wheel. This set was manufactured by Analis (Namur), manufacturer of scientific instruments.
 
The model is in beautiful condition. A rubber belt that provides the drive is probably missing, but this is not disturbing. If you turn the wheel of the dynamo you can make the bell or lamp work, depending on the position of the switch.
 
A fun and decorative item!