Tourbillon
The Tourbillon is the most refined watchmaking complication as well as the most dazzling technique known in watchmaking. It is both folly and wisdom. Folly because the sheer technical nature requires exceptional dexterity, and wisdom because it averages out the irregularities of time. The Tourbillon, a small cage containing the escapement and balance-wheel, offers all master watchmakers the possibility of making their biggest dream come true: to achieve perfection in a mechanism's running.

