The Zenith Defy El Primero 21 made its debut at BaselWorld 2017. As a tribute to the brand's history of producing exceptional chronographs, it runs on the El Primero 9004 movement, which can measure up to 1/100 of a second. This watch also brings back the iconic Defy name for Zenith. In 2021, the collection expanded with the addition of Reference 49.9006.9004/90.R942. This version boasts a khaki green ceramic case and a 'Cordura Effect' rubber strap that perfectly complements its rugged look.