The history of Defy is somewhat murky for various reasons. As a sports watch, it has never been as popular or as culturally important as competing offerings from Rolex and Omega. Over the years, especially as the rise of vintage watches influenced contemporary design, Zenith has focused on the El Primero, sometimes at the expense of other non-chronograph offerings in its catalog. But the lineage of the new Extreme goes all the way back to the very first Defy, the A3642, which arrived in 1969 and featured the avant-garde design of the time combined with some truly next-gen watch technology. It was this Defy that created the theme template for all future Defys, including the Xtremes that appeared mid-term.