100th Of A Second Chronograph from ZENITH

100th Of A Second Chronograph from ZENITH

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The world’s most accurate series-made chronograph enters the 21th century with the Defy El Primero 21. The watch with a COSC-certified in-house movement driving a hundredth of a second display by means of a central hand, with its unique and exclusive dynamic signature of one rotation per second. Its double-chain structure is based on two regulators, made of Carbon-Matrix Carbon Nanotube composite, a patented new material that is insensitive to magnetic fields and temperature gradients to a degree well above existing norms. With its powerful 44 mm titanium case, Defy El Primero 21 becomes the master of extreme precision.


In 1969, Zenith made its stellar contribution to the chronograph saga with the El Primero : an integrated automatic column-wheel mechanism beating at the high frequency of 36,000 vibrations/hour (5Hz) enabling it to reach chronometer-certified tenth of a second precision. It is to this day the world’s most accurate series-made chronograph.

A new century brings new records based on the same DNA, as Zenith supercharges the performance of its speed machine. Defy El Primero 21 displays hundredths of a second by means of a central hand and beats at a frequency of 50 Hz, making it ten times faster and more accurate than its illustrious predecessor. Its balance-spring is made of Carbon-Matrix Carbon Nanotube composite (new patented material).The first fruits of a star-studded renewal.