Zenith Defy El Primero 21 Titanium — Openworked 1/100th Chronograph Blue Rubber | Ref. 95.9002.9004/78.R590

Brushed titanium and the colour blue carry a shared vocabulary — both evoke sky, precision, and the kind of controlled energy that drives high-performance machinery. In the Zenith Defy El Primero 21, these elements converge in a 44 mm case that weighs far less than its commanding presence suggests. The openworked dial presents the El Primero 9004 calibre's inner workings in full: two differently coloured counter bridges framing the twin-engine system that separates the timekeeping oscillator from the dedicated chronograph mechanism, the latter capable of resolving 1/100th of a second.

The technical backstory is essential context. Zenith's El Primero — born in 1969 as the world's first automatic high-frequency chronograph — established 5 Hz, or 36,000 vph, as the standard for serious mechanical chronograph performance. The El Primero 9004 takes this legacy further, running a second oscillating system at 360,000 vph purely to drive the 1/100th of a second hand. This is not a cosmetic achievement; it is a genuine mechanical solution to a genuine precision problem, and the openwork architecture ensures the wearer never loses sight of how it is accomplished.

The blue rubber strap in HNBR quality — a material resistant to heat, oil, and mechanical stress — secures the watch with a titanium double folding buckle. At 10 ATM water resistance, this chronograph is built for environments that match its ambition. The Defy El Primero 21 in titanium is the choice of those who want maximum capability with minimum mass. Time to reach your star.