There are many watches with different ways to write down numbers, but most of their systems are pretty basic. This Geek Wrist Watch has more complex mathematical formulas with equivalent notation for each number. You’d make an MIT student very happy with this gift.
Made in China, the watch shows a radical, a hexadecimal, a binomial coefficient, a graphical representation of binary code, the Golden Mean, a joke in the math world, etc. All of them are explained in a cheat sheet.
The awesome strap looks like made from Mythril (The Lord of the Rings). Standard watch battery included.
Find the geek watch exclusively available at UncommonGoods, for $65.