What's a Tourbillon?

A tourbillon is a holdover from the days of the pocket watch.Also there are tourbillons in the wristwatches,such as Porsche Design replica,Richard Mille replica,Zenith replica,Hublot replica,Ferrari replica watches,Breitling replica,U-Boat replica,Bell&Ross replica,Patek Philippe replica and Omega replicas.
Adjusting a watch for positions, in even the best watches there are small variations between the different vertical orientations (i.e. in the crown up, down, left, or right positions).This is largely due to the combined effect of gravity, the hairspring shape and attachment point on the balance staff and cock, and the regulator pins.
Unlike a wristwatch, a pocket watch worn in a vest will spend the majority of its time in a vertical position. Therefore 18th/19th century watchmaker Abraham Louis Breguet allegedly decided that, for the absolute best accuracy, some means of balancing out the effects of gravity in the various orientations was needed.The solution he devised placed the balance wheel, escape lever, and escape wheel in a cage, which then rotated as a unit within the movement as a result of the normal escapement process. In this way, the overall effects of gravity get balanced out, as the escapement of the movement never spends any significant time in one vertical position.
However, this solution is very complex, with the result that a tourbillon has become more a statement about the watchmaker's skill rather than having any real performance advantage - starting price on a tourbillon is roughly in the $50,000 range. The performance advantage is even further nullified by the fact that wristwatches spend a less predictable amount of time in less predictable positions.
(Fun fact - Lemania makes several tourbillon movements which are supplied to a number of high-zoot companies, so these companies can sell tourbillons without having to spend the development time and money.This list of companies, naturally, is very tightly held.)