Zenith Defy Defy El Primero 21 Ultrablue

Reference 97.9001.9004/81.R946

About this watch

The Zenith Defy El Primero 21 Ultrablue is a masterpiece of horology, boasting an exceptional Zenith caliber El Primero 9004 movement with 36,000 vibrations per hour. Its skeleton dial and vibrant blue accents create a dynamic contrast that's both sporty and elegant. With a water resistance of up to 100 meters and sapphire crystal glass, this watch is built for adventure. The titanium case provides durability and a lightweight feel on the wrist, making it perfect for everyday wear. Whether you're at a formal event or out for a casual day, the Ultrablue fits seamlessly into any occasion. Its unique features and striking design make it a standout piece in any collection, celebrating craftsmanship and style. With its impressive movement, bold design, and user-centric features, this watch is more than just a tool for telling time; it's an experience.

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Key Features

Zenith caliber El Primero 9004 movement
Skeleton dial with vibrant blue accents
Titanium case with water resistance up to 100 meters
Sapphire crystal glass
Chronograph functionality with 50-minute power reserve
Lightweight and comfortable design
Robust materials and construction

Specifications

Brand

Zenith

Family

Defy

Model

Defy El Primero 21 Ultrablue

Reference

97.9001.9004/81.R946

Movement Features

Hours, Minutes, Small Seconds
Chronograph
Chronometer, Power Reserve Indicator

Case

44mm

Dial Color

Skeleton

Crystal

Sapphire

Water Resistance

100

Current Listings

Zenith Defy El Primero Sunray Blue Extreme Diver FULL SET Ref 95.9601.3620/51.I301

Zenith - 95.9601.3620/51.I301 · $7,850

A modern iteration of the Zenith Defy El Primero diver, featuring a unique blue starry sunray pattern on its dial. The watch is powered by an iconic automatic cal 3620 CS movement and comes in a 42.5MM titanium case.

Condition: Pre-owned, appears mint
Case Size: 42.5mm diameter
Movement Type: automatic cal 3620 CS

Posted at

Feb 15, 2026, 12:20 PM

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2020 Zenith Defy El Primero 21 Skeleton Chronograph – Ref. 49.9000.9004/78.R582 – Full Set – Excellent Condition – $7,750 Shipped

Zenith - 49.9000.9004/78.R582 · $7,750

2020 Zenith Defy El Primero 21 Skeleton Chronograph, a high-performance chronograph showcasing Zenith’s innovative 1/100th-of-a-second movement, featuring an openworked dial and lightweight titanium case.

Condition: Excellent
Case Size: 44mm diameter
Case Material: Titanium
Movement Type: Automatic chronograph (El Primero 21, 1/100th second)

Posted at

Feb 12, 2026, 10:02 PM

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Zenith Defy Skyline Skeleton 41mm 49.9300.3620/78.1001 BOXES/PAPERS!

Zenith - 49.9300.3620/78.1001

Size: 41mm

Posted at

Feb 11, 2026, 3:06 PM

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Zenith Defy Skeleton Chrono 03.9500.3600/78.I001

Zenith - 03.9500.3600/78.I001

a Zenith Defy Skeleton Chrono is being listed for sale

Model: Defy Skeleton Chrono

Posted at

Feb 9, 2026, 3:03 PM

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Zenith Defy Skyline Skeleton Black Ceramic

Zenith - Defy Skyline Skeleton · $11,999

The Zenith Defy Skyline Skeleton is a high-end watch featuring a full ceramic construction, skeletonized dial, and El primero movement. It has a 100M water resistance and a power reserve of 55 hours.

Condition: like new
Case Material: Black Ceramic
Water Resistance: 100M
Movement Frequency: 5Hz (36,000 vibration per hour)

Posted at

Feb 8, 2026, 3:34 PM

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