A tourbillon (French for "whirlwind") is a centuries-old mechanism built inside some of the world's most expensive watches. It was originally designed to improve the accuracy of pocket watches by rotating the escapement and balance wheel to help counter the effects of gravity. | Insider Tech

A tourbillon (French for "whirlwind") is a centuries-old mechanism built inside some of the world's most expensive watches. It was originally designed to improve the accuracy of pocket watches by rotating the escapement and balance wheel to help counter the effects of gravity. Today, collectors consider tourbillon watches works of fine art. The construction and assembly of the mechanism are very time-consuming and require extreme precision and patience. Tourbillon watches' complex design, combin