Your one-minute primer to the Zenith Defy El Primero 21.

The legendary El Primero movement received a 21st-century update with a host of innovative features and fitted in the aptly named Defy El Primero 21. Governed by two regulators, one vibrating at 36,000vph for the time and the other at 360,000 for the chronograph, its in-house automatic movement is able to measure intervals of time with a precision of up to 100th of a second. In addition, its balance springs are made of Carbon-Matrix Carbon Nanotube – a new patented material that is impervious to magnetic fields and temperature changes. Available in titanium or ceramicised aluminium.

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