Swiss Watch maker Zenith introduced several very nice watches in their DEFY XTREME 2009 collection. The Defy Xtreme Tourbillon ZERO-G is a mean looking master piece that actually defies gravity. ZENITH has devised a Zero-G (zero gravity) system. The gyroscope cage Tourbillon comprises an escapement mounted on cardan joints rather like marine chronometers. The instrument, which is sensitive to changes of position, is kept in a constant horizontal position, thereby ensuring optimal amplitude for the spiral balance-wheel.