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] TOURBILLON FOR THE WIN! Ultra Rare Zenith El Primero Tourbillon Chronograph in 18K White Gold - Collector Set - Just 50 Made!

TOURBILLON FOR THE WIN! Ultra Rare Zenith El Primero Tourbillon Chronograph in 18K White Gold - Collector Set - Just 50 Made!

The Zenith El Primero is a legendary chronograph with the added feature of a tourbillon, presented in a limited edition of just 50 made. This watch comes in a beautiful collector set including an appraisal from Zenith showing a value of six figures.

  • Condition: really clean condition, including the sapphire crystal
  • Case size: 45mm diameter
  • Material: 18K solid white gold
  • Movement: El Primero automatic chronograph cal 4005
Posted at
Apr 26, 2026, 10:45 PM
Active
[WTS] BIG OL’ PRICE DROP! Zenith El Primero Titanium Chronomaster Sport Full Set Ref 95.3100.3600/39.M3100

BIG OL’ PRICE DROP! Zenith El Primero Titanium Chronomaster Sport Full Set Ref 95.3100.3600/39.M3100

The Zenith El Primero Titanium Chronomaster Sport features a 41mm full titanium case with a gray dial and tri-colored chrono sub-dials. It comes equipped with the iconic El Primero movement, which can be seen through the sapphire case.

  • Case size: 41mm
  • Movement type: automatic
Posted at
Apr 26, 2026, 10:13 PM
Active
[WTS] Zenith Defy Skyline Chrono Silver - El Primero - Full Set 2024 - Integrated Bracelet & Green Strap w/ Deployant - $7,950

Zenith Defy Skyline Chrono Silver - El Primero - Full Set 2024 - Integrated Bracelet & Green Strap w/ Deployant - $7,950

This 2024 Zenith Defy Skyline Chronograph features the El Primero 3600 movement, a high-beat automatic chronograph with a 1/10th-second hand. The watch is powered by a column wheel chronograph with vertical clutch and has a 60-hour power reserve.

  • Condition: Excellent
  • Movement: El Primero 3600
  • Frequency: 36,000 vph (5Hz)
  • Power reserve: 60 hours
Posted at
Apr 26, 2026, 4:52 PM
Active
[WTS][US] Zenith El Primero Chronomaster Sport - White Dial - 41mm - 03.3100.3600/69.M3100 - Full Set

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

Up for sale is a Zenith El Primero Chronomaster Sport - White Dial - 41mm - Full Set Watch functions perfectly mechanically, without issue.

  • Condition: Fantastic condition with few hairlines
  • Case Size: 41mm
Posted at
Apr 24, 2026, 8:41 AM
Active
[WTS] Brand New Zenith Chronomaster Original El Primero Chronograph Reverse Panda | 03.3200.3600/21.C903 | Still under Zenith warranty

Brand New Zenith Chronomaster Original El Primero Chronograph Reverse Panda | 03.3200.3600/21.C903 | Still under Zenith warranty

This Zenith Chronomaster Original Reverse Panda is a brand new, discontinued model still under warranty and comes on the original leather strap.

  • Condition: Brand new, never used
  • Warranty type: 2-year with optional 3-year extension
  • Strap material: leather
  • Box type: LVMH
Posted at
Apr 22, 2026, 12:01 PM
Active
[WTS] Zenith Defy Skyline Chrono Silver - El Primero - Full Set 2024 - Integrated Bracelet & Green Strap w/ Deployant - $8,050

Zenith Defy Skyline Chrono Silver - El Primero - Full Set 2024 - Integrated Bracelet & Green Strap w/ Deployant - $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
[WTS] Ultra Rare Zenith El Primero Tourbillon Chronograph in 18K White Gold - Collector Set JUST 50 MADE!

Ultra Rare Zenith El Primero Tourbillon Chronograph in 18K White Gold - Collector Set JUST 50 MADE!

The Zenith El Primero Tourbillon Chronograph is a limited edition of just 50 made in full 18 karat white gold, featuring a tourbillon and automatic chronograph cal 4005.

  • Condition: Really clean condition, with minimal wear on the case
  • Movement: El Primero automatic chronograph cal 4005
  • Case Size: 45MM diameter
  • Case Material: 18K solid white gold
Posted at
Apr 19, 2026, 10:25 PM
Active
[WTS] Zenith El Primero Titanium Chronomaster Sport FULL SET Ref 95.3100.3600/39.M3100

Zenith El Primero Titanium Chronomaster Sport FULL SET Ref 95.3100.3600/39.M3100

The Zenith El Primero Chronomaster Sport is a titanium version of the iconic chronograph movement in a modern automatic calibre 3600. It features a gray dial, tri-colored chrono sub-dials, and a sapphire case allowing for viewing of the rotor.

  • Condition: Excellent, some light wear on titanium bezel and case sides
  • Movement: El Primero cal 3600 automatic
  • Case size: 41mm diameter
  • Bracelet length: 7.25 inches, adjustable with two additional links
Posted at
Apr 19, 2026, 8:42 PM
Active
[WTS][US] Zenith El Primero Chronomaster Sport - White Dial - 41mm - 03.3100.3600/69.M3100 - Full Set

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

Up for sale is a Zenith El Primero Chronomaster Sport with a white dial and 41mm case, featuring a perfectly working mechanical movement.

  • Condition: Fantastic condition with few hairlines on clasp, case, and bracelet
  • Diameter: 41mm
  • Case Condition: few hairlines on clasp, case, and bracelet
Posted at
Apr 17, 2026, 6:30 AM
Active