The Zenith Defy El Primero 21 was introduced at BaselWorld 2017. Building upon the brand's rich chronograph tradition, it is powered by the new El Primero 9004 movement, capable of measuring up to 1/100 of a second. In addition, it marks the return of the Defy name for Zenith.Reference 49.9001.9004/78.R916 was added to the collection in 2019. This limited edition of 250 pieces -exclusive to Zenith boutiques- features a blue finish to its movement. This version is fitted with a rubber strap with cordura-effect finish.