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The Educated Monkey curious calculator


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Not a puzzle. But rather a curiosity.  An amazing calculator that can multiply and divide, add and subtract! A mechanical calculator. No batteries required!

Only 11 left

Availability: In stock



Not a puzzle. But rather a curiosity.  This is a replica of a toy that was sold around the world after it was first invented by William Robertson of Belmont, Ohio, USA in 1916-1918.

This ingenious device was considered both a novelty and and educational aid back in the 1920's before the day of the calculator and the computer. 

What can it do? The monkey can multiply and divide.  It can teach the complete multiplication and division tables. It also add, subtract, multiply, divide or factor basic numbers. It includes an entertaining and instructive game for children... and big kids too!  And it's linked motion makes a mechanical puzzles for the more advanced students to ponder over.

A mechanical calculator.  No batteries requried!   Great novelty present for an executive desk too!  

The item is made from painted tin plate.   The box is: 142mm x 157mm x 17mm   Note: The boxes have slight rub marks on them above the name and on the brand on the front where they have been stacked against each other and rubbed during transit.  There is no damage to the toy inside.

Additional Information

Difficulty Level No
Designer -

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