Zenith Defy Defy El Primero 21 Black Ceramic / Skeleton / Alligator

Reference 49.9000.9004/78.R582

About this watch

The Zenith Defy El Primero 21 Black Ceramic / Skeleton / Alligator is a stunning timepiece that showcases exceptional craftsmanship and innovative technology. Its skeleton design allows you to see the intricate workings of the movement, making it a fantastic conversation starter. The black ceramic case adds a modern touch, while the open-back design gives a sneak peek at the beautifully crafted movement. With its dual escapement system, this watch maintains a high level of accuracy, ensuring consistent performance whether using the chronograph or just checking the time. The watch comes with a power reserve indicator for the chronograph and an alligator leather strap that adds a touch of elegance. Whether you’re dressing up for a formal occasion or going casual, this strap has you covered. With its striking contrast between the skeleton design and bold black ceramic case, this watch is easy to read in any lighting condition. At 44 mm in diameter and 14.5 mm in height, the Defy El Primero 21 has a substantial presence on the wrist, but it’s surprisingly comfortable to wear thanks to its ergonomic design.

Buy Now on Jomashop

This is an affiliate link

Key Features

Zenith Caliber El Primero 9004 Movement
Dual Escapement System for Precise Timing
Skeleton Design with Black Ceramic Case
Chronometer Certified for Accuracy
Power Reserve Indicator for Chronograph
Alligator Leather Strap with Adjustable Lug Width

Specifications

Brand

Zenith

Family

Defy

Model

Defy El Primero 21 Black Ceramic / Skeleton / Alligator

Reference

49.9000.9004/78.R582

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 Classic Skeleton Titanium 95.9000.670/78.M9000 41mm Full Set - $6,495

Zenith - 95.9000.670/78.M9000 · $6,495

Up for sale is a Zenith Defy Classic Skeleton Titanium, a 2020 model with a 41mm case.

Condition: Excellent condition with minimal signs of wear
Case material: titanium
Case size: 41mm

Posted at

Apr 22, 2026, 10:11 AM

Active

View listing on r/WatchExchange

(Zenith) (Defy Classic Titanium) (5700 OBO With Bracelet and Alligator Strap)

Zenith - 95.9000.670/77.R782 · $5,700

This Zenith Defy Classic Titanium is a 41mm watch with a silver skeleton dial, housed in a titanium case with a stainless steel bracelet and an alligator strap.

Condition: Good to new
Bracelet material: Stainless Steel
Case material: Titanium
Dial color: silver skeleton

Posted at

Apr 21, 2026, 7:21 PM

Active

View listing on r/WatchExchange

Zenith Defy Skeleton. Titanium. Clean. Lightweight..

Zenith - Defy Skeleton · $5,250

A lightweight Zenith Defy Skeleton in titanium, featuring a skeleton design.

Condition: Clean, Lightweight
Material: Titanium
Shipping: Fedex with insurance worldwide

Posted at

Apr 21, 2026, 7:13 PM

Active

View listing on r/WatchExchange

Zenith Defy Skyline Chrono Silver - El Primero - Full Set 2024 - Integrated Bracelet & Green Strap w/ Deployant - $8,050

Zenith - 03.9500.3600/01.I001 · $8,050

This is a Zenith Defy Skyline Chrono Silver with an El Primero movement, featuring a silver 'Starry Sky' dial and integrated stainless steel bracelet.

Condition: Excellent
Movement: El Primero 3600, automatic chronograph
Frequency: 36,000 vph (5Hz)
Power Reserve: 60 hours

Posted at

Apr 21, 2026, 3:45 PM

Active

View listing on r/WatchExchange

Zenith Defy Classic White Ceramic 49.9301.3620/79.I001 ♦️Brand New 2021♦️

Zenith - 49.9301.3620/79.I001 · $15,898

This is a brand new Zenith Defy Classic White Ceramic timepiece, dated to Q4 2021.

Condition: Brand New
Year Of Production: 2021
Box And Papers Included: true
Shipping Cost Separate: true

Posted at

Apr 20, 2026, 11:50 PM

Active

View listing on r/WatchExchange

🔥NEW 2026 ZENITH DEFY SKYLINE SKELETON BLUE DIAL COMPLETE SET🔥

Zenith - 03.9300.3620/79.I001 · $9,199

A new 2026 Zenith Defy Skyscape Skeleton watch featuring a blue dial and stainless steel case, measuring 41mm in size.

Condition: Brand New/Unworn
Case Size: 41MM diameter
Dial Color: Blue

Posted at

Apr 20, 2026, 11:26 PM

Active

View listing on r/WatchExchange

Zenith Defy Revival A3691

Zenith - A3691 · $5,100

This Zenith Defy Revival features a 37mm stainless steel case with a ruby gradient dial and Cal. Elite 670 automatic movement.

Condition: Very good condition, worn
Case size: 37mm diameter
Water resistance: 300m depth rating
Movement type: automatic

Posted at

Apr 19, 2026, 12:12 AM

Active

View listing on r/WatchExchange

Zenith Defy Skyline Skeleton Black Ceramic

Zenith - Defy Skyline Skeleton · $11,500

This Zenith Defy Skyline Skeleton features a full ceramic construction with 100M WR and an El primero movement beating at 5Hz, along with a skeletonized dial and rotor.

Condition: like new
Water Resistance: 100m
Power Reserve: 55hr
Vibration Per Hour: 36000

Posted at

Apr 17, 2026, 5:51 PM

Active

View listing on r/WatchExchange

Zenith Defy Skyline Ice Blue Japan Exclusive 03.9300.3620/16.I001 - 9.9/10 - $7,800

Zenith - 03.9300.3620/16.I001 · $7,800

This is a stunning Zenith Defy Skyline Ice Blue, Japan-exclusive /16 variant with baguette diamond hour markers and an El Primero Caliber 3620 movement.

Condition: 9.9/10 - essentially new
Case size: 41mm diameter
Water resistance: 100m
Movement frequency: 5Hz / 36,000vph

Posted at

Apr 15, 2026, 1:18 PM

Active

View listing on r/WatchExchange