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Zeniths Defy Extreme Zero-G watch is probably one of the most technologically advanced timepieces ever built. Considering that horologys ultimate quest is the creation of the most accurate watch, Zenith stays true to this commitment with the Defy Extreme Zero-G Tourbillon watch. The tourbillon instrument alone comprises 294 parts which includes a second gear train as reference point for the swinging of the escapement axles and a differential gear with inverter that compensates for all the relative movements of the framework. The dial is made of multi-layered Hesalite glass, carbon fiber and aluminum featuring the hour and minute display at 11 oclock and the gyroscopic tourbillon cage at the 5 oclock position. The Zero-G Tourbillon watch has a 46.5 mm blackened titanium case that is waterproof at 1000 meters, a protected crown, helium valve, and titanium bracelet with Kevlar inserts. Other than being waterproof, it has high-temperature resistance that makes it the ideal timepiece for any extreme sports enthusiast.