Equation Watch

As you make your way round the tremendously complex Equation Watch, your time-telling skills will be tested like never before!

With every usual hour comes a rather difficult equation representing that number in question, the most mathematically advanced wrist-watch ever invented.

Features

• One Equation Watch 
• Each hour is replaced with an equation
• Great gift for the brainy and intellectual
• Water-resistant
• Requires: 1 x SR626SW battery (included)