Nowadays, the popularity of wristwatches has increased significantly and to meet this demand; Zenith has launched two new collections of Defy Skyline Tourbillon with high frequency. These collections include stainless steel and black ceramic models. Zenith Defy Skyline watches are water-resistant and can survive depths of up to 100 meters. Read here for more information on the new Zenith Defy Skyline Tourbillon collection.