In 2017, Zenith unveiled the Defy El Primero 21 at BaselWorld. This timepiece pays tribute to the brand's impressive history of chronographs and boasts the new El Primero 9004 movement, capable of measuring 1/100th of a second. Not only that, it also marks the return of the Defy name for Zenith. Fast forward to 2021, the Zenith Defy El Primero 21 reference 97.9001.9004/81.R946 joins the collection. Similar to 2020's Ultraviolet, it sports a sleek sandblasted titanium case, but with a cool 'Ultra' blue touch on the movement, dial, and strap. It's