Steinhausen TW-521-G Tourbillon Mechanical Watch Gold The Steinhausen TW-521-G Tourbillon Mechanical Watch in gold features a particularly complex and sophisticated design, and is well-suited for a man who appreciates the intricacies of watch mechanics. Patented in 1801 in Switzerland, the invention of the Tourbillon is often cited as the most significant development in watch history. It consists of a regulating mechanism (balance wheel with hairspring) and a lever escapement, which makes one revolution in one minute. It eliminates effects of friction and earth's gravity. Among the world's most gifted watchmakers, only a select few are capable of manufacturing a Tourbillon. When a watch's escapement is in a vertical position, the earth's gravity either accelerates or slows the balance movement, causing a rate gain or loss. The Tourbillon Mechanical Watch compensates for the gravity-induced gain or loss with its mobile carriage. The Tourbillon Mechanical Watch, whose carriage is mount