Early educational tool for basic arithmetic quizzes.

Assists with memory-based calculations.

This machine simply allows the multiplication of two numbers between 1 and 9.

Made of tin, used for multiplying numbers.

With this device we can multiply numbers between 1 to 20.

This cylinder (made around 1950) gives the result of the product of numbers between 1 to 16 with numbers between 1 to 20.

You select a number on the left between 0 to 9 and slightly on the right the number of the multiplier. The result of the product is shown in a window at the center.

You can select any figures between 1 to 10 to get multiplied together.

Machine used for teaching calculus to kids

Replica of the original machine “CONSUL” The Educated Monkey