Richard Mille: The RM27

Richard Mille is a newer watch company (est. 2001), but what they lack in history, they make up in pure engineering brilliance. With their cutting-edge design, they've taken horology to new heights. For instance, the famed RM27 (created for Rafael Nadal) is so light it floats in water. The movement itself weighs in at 3.83 grams. In short, this one's a prime example of what 21st-century watchmaking is all about.

Read more: http://www.esquire.com/the-side/style-guides/heirloom-watches-2012#ixzz1daM37PoG