Zenith Chronomaster Open Steel — Black Matte Tri-Colour El Primero Dial | Ref. 03.3300.3604/21.M3300

Black dials have always carried a particular gravitas, and the Chronomaster Open in its black matte configuration is no exception. The 39.5 mm steel case sits at a diameter that balances the demands of legibility and elegance, a proportion Zenith has refined across generations of Chronomaster development. The black matte dial deploys two differently coloured counters alongside a distinctive hesalite counter — a nod to the material used on the original 1969 El Primero — creating a tricolour subdial arrangement that is simultaneously a functional chronograph layout and a piece of watchmaking history rendered visible.

The El Primero movement operating within this case delivers 1/10th of a second chronograph resolution — a specification that flows directly from its 5 Hz beat rate, the same frequency that distinguished the calibre from all competitors when it launched over half a century ago. Approximately 60 hours of power reserve sustain the movement between windings, and the open-heart architecture allows direct observation of the oscillating wheel and escapement in motion. To wear the Chronomaster Open is to carry a window into the manufacture's most significant achievement.

An integrated steel bracelet completes the watch, its links echoing the case's architecture and securing the ensemble with a clean folding clasp. Water resistant to 10 ATM. The Chronomaster Open is the watch for the collector who has moved past surface appreciation and wants to understand, visually and mechanically, exactly how Zenith's precision is produced. Time to reach your star.