Zenith El Primero Chronomaster Open Stainless Steel / Black / Rubber

Reference 03.3300.3604/21.C822

About this watch

The Zenith Chronomaster Open is a masterpiece of luxury watchmaking, combining stunning design with exceptional technical prowess. This stainless steel timepiece boasts a 39.50mm case that strikes a perfect balance between robustness and elegance, while the sunburst black dial provides an excellent backdrop for the luminescent stick and dot indexes. The El Primero 3604 movement is a high-frequency automatic chronograph that measures time with incredible precision, featuring a frequency of 36,000 vibrations per hour and a power reserve of 60 hours. With its modified design, open base plate and bridges create a stunning view of the movement, showcasing Zenith's mastery in timekeeping. The Chronomaster Open is not just a timepiece, but a conversation starter, a piece of history, and a testament to the art of Swiss watchmaking.
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Key Features

  • 39.50mm stainless steel case
  • Sunburst black dial with luminescent indexes
  • El Primero 3604 high-frequency automatic chronograph movement
  • Frequency: 36,000 vibrations per hour
  • Power reserve: 60 hours
  • Modified design with open base plate and bridges
  • Sapphire crystal glass
  • Water resistance: 100m

Specifications

Brand
Zenith
Family
El Primero
Model
Chronomaster Open Stainless Steel / Black / Rubber
Reference
03.3300.3604/21.C822
Movement Features
  • Hours, Minutes, Small Seconds
  • Chronograph, Column wheel
Case
Stainless Steel 39.5mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
100

Current Listings

[WTS] Zenith Chronomaster El Primero 03.2040.400/26.c496 42mm $4,400

Zenith Chronomaster El Primero 03.2040.400/26.c496 42mm $4,400

This is a Zenith Chronomaster El Primero 42mm watch with date function. The watch has been polished recently and comes with its original box along with a third party strap.

Posted at
Mar 4, 2026, 11:33 PM
Active
[WTS] PRICE DROP! Incredible Zenith El Primero Flyback in 18K Gold Grand Chronomaster XT COLLECTOR SET!

PRICE DROP! Incredible Zenith El Primero Flyback in 18K Gold Grand Chronomaster XT COLLECTOR SET!

Zenith - 35.1250.4009 · $13,950
The Zenith El Primero Flyback is a stunning gold dress watch featuring an off-white dial with guilloche work and a clean, classic design. The watch comes in a collector's set and is powered by the automatic chronograph cal 4009.

  • Condition: appears mint with wear throughout
  • Diameter: 43mm
  • Case material: 18K solid yellow gold
  • Movement type: automatic chronograph
Posted at
Mar 1, 2026, 8:50 PM
Active
[WTS] Whole Lotta Wrist Fun! Zenith Defy Titanium Extreme Diver El Primero Sunray Blue Dial FULL 2024 Set!

Whole Lotta Wrist Fun! Zenith Defy Titanium Extreme Diver El Primero Sunray Blue Dial FULL 2024 Set!

A modern iteration of the Zenith El Primero Defy diver with a titanium case, featuring an insane blue starry sunray pattern dial and a sapphire crystal case back.

  • Condition: Mint
  • Diameter: 42.5mm
  • Case material: Titanium
  • Movement: El Primero automatic cal 3620 CS
Posted at
Mar 1, 2026, 7:57 PM
Active
[WTS] Zenith El Primero New Vintage 1969 Limited Edition 40th Anniversary 96 1969 469/ 77 C683 ♦️Lightly Used 2014♦️

Zenith El Primero New Vintage 1969 Limited Edition 40th Anniversary 96 1969 469/ 77 C683 ♦️Lightly Used 2014♦️

A Zenith El Primero New Vintage 1969 Limited Edition, a special edition marking the 40th anniversary of the Calibre 135. This watch is in lightly used condition and comes with its full set, including box and papers.

  • Condition: Lightly Used
  • Year Of Production: 2014
  • Anniversary Type: 40th Anniversary
  • Limited Edition: true
Posted at
Feb 27, 2026, 9:22 PM
Active
[WTS] Zenith El Primero Chronomaster Sport - White Dial - 41mm - 03.3100.3600/69.M3100 - Full Set

Zenith El Primero Chronomaster Sport - White Dial - 41mm - 03.3100.3600/69.M3100 - Full Set

A Zenith El Primero Chronomaster Sport, a 41mm watch featuring a white dial.

  • Condition: Fantastic with minor hairlines
  • Case Size: 41mm diameter
  • Bracelet Condition: Minor hairlines on clasp
Posted at
Feb 26, 2026, 8:13 AM
Active