Zenith

CHRONOMASTER Open

Ref.03.3300.3604/69.M3300

"El Primero," the masterpiece of automatic chronographs born in 1969. While inheriting the three-color counter of the "A386," an early model that symbolizes its history, it has evolved into a modern form that allows you to enjoy the heartbeat of the movement from the dial side. This model, refreshed in 2022, is a timepiece that embodies the high-frequency chronograph technology Zenith has cultivated and its pursuit of innovation for over half a century.

The Chronomaster Open is powered by Zenith’s renowned El Primero 3604 movement. Its high-beat mechanism beats 36,000 times per hour, enabling measurement and display to within 1/10th of a second. In addition to the dynamic sweep of the central seconds hand, which completes a revolution every 10 seconds, it offers approximately 60 hours of power reserve. Combining advanced watchmaking craftsmanship with excellent practicality, this timepiece allows you to fully enjoy the appeal of a mechanical chronograph.

A distinctive design featuring a contrasting colored inner dial set against a subdued matte silver dial. The transparent small seconds subdial at 9 o’clock offers a glimpse into the intricately moving heart of the movement. The 39.5 mm stainless steel case and integrated bracelet combine sportiness with refined elegance. The result is a striking timepiece that fuses traditional craftsmanship with contemporary aesthetics.