ZenithDefy El Primero 2149.9000.9004/78.R782

Versatility and durability are at the core of the DEFY 21 in black ceramic with a textured rubber strap. The open dial reveals the El Primero 21 1/100th of a chronograph movement.A high-frequency revolution. The El Primero 21 is the culmination of over 50 years of perfecting the automatic chronograph at the Zenith manufacture. Equipped with two regulating organs and escapements, one beating at 5Hz for timekeeping, and the other at an incredible 50Hz to offer a true 1/100th of a second chronograph display, the El Primero 21 is the chronograph calibre of the 21st century.