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.

Buy Now on Jomashop

This is an affiliate link

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

2020 Zenith Defy El Primero 21 Skeleton Chronograph 49.9000.9004/78.R582 – Full Set – $7,300 Shipped

Zenith - 49.9000.9004/78.R582 · $7,300

A high-performance chronograph showcasing Zenith’s innovative 1/100th-of-a-second movement, housed in a lightweight titanium case.

Condition: Excellent
Case size: 44mm
Case material: Titanium
Movement type: Automatic chronograph (El Primero 21, 1/100th second)

Posted at

Feb 21, 2026, 12:07 PM

Active

View listing on r/WatchExchange

Zenith Defy Classic 41mm Titanium Skelton Dial 95.9000.670/78.R782

Zenith - 95.9000.670/78.R782 · $6,695

The Zenith Defy Classic features a slim profile, titanium construction, and bold geometry with an open-worked architecture.

Condition: Excellent
Material: titanium
Size: 41mm

Posted at

Feb 20, 2026, 12:59 PM

Active

View listing on r/WatchExchange

Titanium Zenith Defy El Primero 21 Skeleton Box & Papers

Zenith - 95.9000.9004/78.R582 · $70,000

The Zenith Defy El Primero 21 Skeleton is housed in lightweight titanium, featuring an open-worked skeleton dial and the in-house El Primero 9004 movement.

Condition: Great Pre-Owned condition with light signs of wear
Material: lightweight titanium
Movement: in-house El Primero 9004

Posted at

Feb 20, 2026, 11:29 AM

Active

View listing on r/WatchExchange

Zenith Defy Classic Skeleton 95.9000.670/78.M9000 - Full Kit

Zenith - 95.9000.670/78.M9000 · $5,800

This Zenith Defy Classic Skeleton is a high-end timepiece sold new from a dealer in 2020.

Condition: Excellent with minor blemishes (scuffing on the inside of the bracelet)
Year Purchased: 2020
Purchase Method: new from a dealer
Accessories Included: all links, box, card, instructions, cleaning cloth, hang tag

Posted at

Feb 19, 2026, 12:14 PM

Active

View listing on r/WatchExchange

Zenith Defy Classic Titanium Blue - Full Set

Zenith - 95.9000.670/51.M9000 · $4,200

The Zenith Defy Classic Titanium features a sunburst blue dial, in-house Elite 670 automatic movement, and Grade 5 titanium construction for an impossibly light and comfortable wear.

Condition: good condition with minor blemishes on the bezel and desk-diving marks on the bracelet
Case size: 41mm
Thickness: 10.75mm
Material: Brushed and Polished Grade 5 Titanium

Posted at

Feb 18, 2026, 9:28 PM

Active

View listing on r/WatchExchange

Zenith Defy Skeleton White Ceramic Box & Papers

Zenith - 49.9002.670/01.R792 · $6,699

The Zenith Defy Classic in full white ceramic is a modern icon that blends cutting-edge design with technical mastery, featuring an openworked concept and a skeletonized dial revealing the Elite 670 automatic movement. The watch has a 41mm case and houses a beautifully finished movement with blackened bridges and luminous hands for contrast and legibility.

Condition: Great pre-owned condition
Case diameter: 41mm
Movement: Elite 670 automatic movement

Posted at

Feb 18, 2026, 10:39 AM

Active

View listing on r/WatchExchange

Zenith Defy Skeleton Chrono 03.9500.3600/78.I001

Zenith - 03.9500.3600/78.I001

Model type: Defy Skeleton Chrono

Posted at

Feb 17, 2026, 4:45 PM

Active

View listing on r/WatchExchange

Zenith Defy Gauss 28800, 39mm, circa 1970

Zenith - Defy Gauss 28800 · $1,800

This Zenith Defy Gauss is a high-beat rate watch from the 1970s, specially designed to withstand high radiation and magnetic fields.

Case size: 39mm
Production number: Fewer than 600 made
Dial color: Blue

Posted at

Feb 17, 2026, 4:21 AM

Active

View listing on r/WatchExchange

Zenith Defy Skyline Skeleton Black Ceramic

Zenith - Defy Skyline Skeleton · $11,999

For sale is a Zenith Defy Skyline Skeleton Black Ceramic watch, featuring a full ceramic construction with 100M water resistance and an El primero movement beating at 5Hz.

Condition: like new
Water resistance: 100m
Movement type: El primero
Beats per hour: 36000

Posted at

Feb 15, 2026, 1:02 PM

Active

View listing on r/WatchExchange