At the 2017 BaselWorld event, Zenith unveiled the new Defy El Primero 21 watch. It stays true to the brand's legacy of exceptional chronographs and boasts the impressive El Primero 9004 movement, which can accurately measure up to 1/100 of a second. This release also marks the return of the Defy name for Zenith. In 2018, a special version of the watch, the Reference 49.9003.9004/76.R591, was launched in collaboration with music icon Swizz Beatz. Limited to just 5 pieces, it showcases a stunning white gold case adorned with diamonds.