Zenith Defy Defy El Primero 21 Carl Cox

Reference 10.9001.9004/99.R941

About this watch

The Zenith Defy El Primero 21 Carl Cox is a masterpiece of modern watchmaking, featuring the renowned El Primero 9004 caliber with a cam-actuated chronograph capable of measuring time to 1/100 of a second. This self-winding movement boasts a power reserve for the chronograph of 50 minutes and operates on its own escapement system, with a balance wheel that ticks away at an astounding 360,000 beats per hour. The skeleton design allows you to see the intricate mechanics at work, adding an extra layer of fascination. With its striking design, impressive functionality, and water resistance of up to 100 meters, this watch is perfect for adventurous souls who want to own a piece of horological history.

Buy Now on Jomashop

This is an affiliate link

Key Features

Carbon case with sapphire glass
El Primero 9004 caliber with chronograph function
Sapphire crystal with anti-reflective coating
Water resistance up to 100 meters
44mm diameter and 23mm lug width

Specifications

Brand

Zenith

Family

Defy

Model

Defy El Primero 21 Carl Cox

Reference

10.9001.9004/99.R941

Movement Features

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

Case

Carbon 44mm

Dial Color

Skeleton

Crystal

Sapphire

Water Resistance

100

Current Listings

Zenith Defy. Titanium. Strap on deployant included.

Zenith - Defy · $5,850

A Zenith Defy titanium watch for sale, featuring a 41mm case and including an OEM rubber strap and deployant clasp, as well as a box and manual.

Condition: Very clean
Case size: 41mm
Material: Titanium

Posted at

Mar 28, 2026, 12:13 PM

Active

View listing on r/WatchExchange

2022 Zenith Defy Skyline Black Dial 41mm 03.9300.3620/21.I001 - Full Set

Zenith - 03.9300.3620/21.I001 · $5,997

The Zenith Defy Skyline features a sleek black dial and a 41mm angular case with an integrated bracelet. The watch is crafted in stainless steel and offers exceptional depth and contrast.

Condition: excellent preowned, like new condition
Case size: 41mm diameter
Water resistance: 100m depth rating
Movement type: El Primero high-frequency automatic movement

Posted at

Mar 27, 2026, 4:00 PM

Active

View listing on r/WatchExchange

Zenith Defy Skyline. Blue dial. Jan 2026. Full Kit

Zenith - 03.9300.3620/51.I001 · $5,900

This is a preowned Blue Dial Zenith Skyline from Jan 2026 with a January 2026 warranty card.

Condition: Excellent condition and partially stickered
Warranty expiration date: Jan 2028
Dial color: blue
Size: 41mm diameter

Posted at

Mar 27, 2026, 3:30 PM

Active

View listing on r/WatchExchange

Zenith | 03.9300.3620/15.I001 | Defy Skyline Ice Blue | $7,750

Zenith - 03.9300.3620/15.I001 · $7,750

This Zenith Defy Skyline Ice Blue is a high-end watch featuring an ice blue dial and a stainless steel case.

Condition: preowned clean condition with minor hairline scratches throughout
Service history: unknown
Shipping: free 2 day insured fedex
Return policy: no returns, all sales are final

Posted at

Mar 27, 2026, 3:06 PM

Active

View listing on r/WatchExchange

Zenith Defy Classic Carbon Skeleton 10.9000.670/80.R795 | Full Set 2022 | Ultra Light 65g | Titanium Clasp

Zenith - 10.9000.670/80.R795

The listing is for a Zenith Defy Classic Carbon Skeleton from 2022, featuring an ultra-lightweight design of just 65g.

Weight: 65g
Material: Titanium
Year: 2022

Posted at

Mar 27, 2026, 9:57 AM

Active

View listing on r/WatchExchange

Zenith Defy Skyline Chronograph Skeleton | Ref. 03.9500.3600/79.I001 | 2025 | Unworn | Full Set

Zenith - 03.9500.3600/79.I001 · $12,450

The Zenith Defy Skyline Chronograph Skeleton features a stunning blue openworked skeleton dial, powered by the high-frequency El Primero chronograph movement, allowing for true 1/10th of a second chronograph precision.

Condition: Unworn
Case diameter: 42mm
Water resistance depth rating: 100m
Power reserve duration: ~55 hours

Posted at

Mar 27, 2026, 6:50 AM

Active

View listing on r/WatchExchange