Maths Wall Clock

Glass analog clock with a very creative design that shows various mathematical operations like a blackboard. 
With this great watch, when looking at the time you will not be able to escape the dreaded mathematics. 
An excellent and suggestive decorative element, and a perfect gift for math teachers or lovers of this matter. 
The Math wall clock is also ideal for academies or colleges. 
It works with batteries (1 x AA, not included) and its diameter is approx. 35 cm (thickness: approx. 0.3 cm).