Zenith Defy El Primero 21

Ref. 95.9002.9004/78.R584 – 2021 – Like New – Complete

The Zenith Defy El Primero 21 stands as one of the most technically advanced chronographs in modern watchmaking—an evolution of the legendary El Primero architecture built to measure time at the breathtaking precision of 1/100th of a second. This reference pairs cutting-edge engineering with bold contemporary design, resulting in a watch that is as visually striking as it is mechanically significant.

This 2021 example is in like-new, excellent condition, presenting crisp case surfaces, a clean rubber strap, and an overall appearance that reflects careful handling. It is accompanied by its complete set of original accessories, maintaining full collector integrity.

One of the standout features of this model is its blue skeletonized dial frame, a structural visual element that showcases the high-frequency movement beneath. The openworked architecture reveals the twin escapements—one dedicated to the running time, the other exclusively for the 1/100-second chronograph—highlighting the complexity that defines the El Primero 21. The blue accents bring depth and contrast, making the dial both futuristic and highly legible.

At the center of the experience is the lightning-fast chronograph, with its central hand completing a full rotation every second. This dramatic motion is a hallmark of the Defy El Primero 21, demonstrating the movement’s ability to operate at 360,000 vibrations per hour for the chronograph mechanism. It is one of the most visually captivating chronograph displays in the modern watch world.

The lightweight titanium case offers durability without compromising comfort, while the sporty rubber strap ensures versatility for everyday wear. The combination of technical mastery and contemporary design makes this reference one of the most compelling modern Zenith offerings.

Specifications

• Reference: 95.9002.9004/78.R584

• Year: 2021

• Case Size: 44mm

• Case Material: Brushed titanium

• Dial: Skeletonized with blue frame architecture

• Movement: Zenith El Primero 21 (1/100th-second chronograph)

• Vibration Rates:

  • 36,000 vph (timekeeping escapement)

  • 360,000 vph (chronograph escapement)

• Power Reserve: Dual barrels for separate functions

• Crystal: Sapphire front and back

• Strap: Rubber with titanium buckle

• Condition: Like New / Excellent

• Set Includes:

  • Complete accessories as originally delivered

  • Boxes, warranty materials, and documentation

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A showcase of Zenith’s technical ambition, the Defy El Primero 21 blends mechanical innovation with bold architectural design. With its blue skeleton frame, ultra-high-frequency chronograph, and lightweight titanium construction, it offers a modern and unmistakably distinctive presence on the wrist.