Zenith El Primero Chronomaster Open Stainless Steel / Black / Bracelet

Reference 03.3300.3604/21.M3300

About this watch

The Zenith Chronomaster Open is a stunning timepiece that perfectly marries style and function. From its rich heritage and reliable movement to its elegant design, it ticks all the boxes for anyone in search of a luxury watch. The round stainless steel case, measuring 39.50 mm, strikes the perfect balance between presence and wearability. The sunburst black dial adds a touch of depth, catching the light in a way that makes it utterly mesmerizing. The chronograph feature is where this watch truly shines, with its column wheel mechanism allowing for seamless starting, stopping, and resetting. With its 1/10th of a second automatic chronograph movement, this watch is a testament to Zenith's commitment to precision and innovation.
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Key Features

  • Zenith caliber El Primero 3604 movement
  • Stainless steel case with 39.50 mm diameter
  • Sapphire crystal glass for durability
  • 100 m water resistance for versatility
  • 60 hour power reserve for reliability
  • Column wheel chronograph mechanism for precision
  • Open base plate and bridges for transparency

Specifications

Brand
Zenith
Family
El Primero
Model
Chronomaster Open Stainless Steel / Black / Bracelet
Reference
03.3300.3604/21.M3300
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 Original El Primero Chronograph Reverse Panda | 03.3200.3600/21.C903 | Brand New with Full Zenith warranty

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

A brand new Zenith Chronomaster Original Reverse Panda, a discontinued model still in its protective stickers.

  • Condition: Brand new, never used
  • Case size: not specified
  • Water resistance: not specified
  • Strap material: leather
Posted at
Apr 13, 2026, 8:56 AM
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 legendary watch featuring a tourbillon and chronograph functions in a limited edition of just 50 pieces. It 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.
  • Movement Type: El Primero automatic chronograph cal 4005
  • Case Material: 45MM 18K solid white gold
  • Case Dimensions: 45mm diameter
Posted at
Apr 12, 2026, 9:52 PM
Active
[WTS] Zenith El Primero Chronomaster Sport Titanium Full Box & Cards Set Ref 95.3100.3600/39.M3100

Zenith El Primero Chronomaster Sport Titanium Full Box & Cards Set Ref 95.3100.3600/39.M3100

This is a 2-year-old Zenith El Primero Chronomaster Sport Titanium watch with a gray dial and tri-colored chrono sub-dials. It features a 41mm full titanium case and an iconic chronograph movement.

  • Condition: like new, with some light wear on the titanium bezel and case sides
  • Case size: 41mm diameter
  • Movement type: automatic
  • Depth rating: 30m water resistance
Posted at
Apr 12, 2026, 8:32 PM
Active
[WTS] Zenith Defy El Primero 21 $5150 Priced to move

Zenith Defy El Primero 21 $5150 Priced to move

A high-end sports watch designed for everyday wear, featuring a complex automatic movement and a modern design.

  • Condition: Moderate wear, light scratches on the case/bezel/claps
  • Serial number: unknown
  • Box and cards included: no
  • Shipping method: insured and tracked
Posted at
Apr 12, 2026, 7:59 PM
Active
[WTS] Zenith Defy El Primero 21 $5300 95.9002.9004/78.R584

Zenith Defy El Primero 21 $5300 95.9002.9004/78.R584

The Zenith Defy El Primero 21 is a high-end watch with a unique design and impressive features.

  • Condition: Moderate wear, fully functional
  • Serial number: 78.R584
Posted at
Apr 11, 2026, 9:32 PM
Active
[WTS] Zenith El Primero ref. 01.0200.415 Big Blue 7000 run like hell circa 1973

Zenith El Primero ref. 01.0200.415 Big Blue 7000 run like hell circa 1973

A Zenith El Primero Big Blue from the 1970s, featuring a high-frequency automatic chronograph movement and an oversized TV-shaped case with a vibrant blue dial.

  • Condition: Excellent for its age
  • Case size: 42mm
  • Lug to lug distance: 44h
  • Crystal size: 14.3 cc
Posted at
Apr 8, 2026, 4:48 PM
Active
Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete

Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete

A Zenith El Primero Chronomaster Open Heart chronograph watch, featuring a 42mm stainless steel case and in-house Caliber Zenith El Primero 4061 movement. The watch is dated October 2014 and has been recently serviced by Zenith.

  • Condition: Mint Condition with light hairline scratches only
  • Case size: 42mm diameter
  • Water resistance: 30m depth rating
Posted at
Mar 31, 2025, 1:26 PM
Active
Zenith El Primero Synopsis Open Heart � BOX & PAPERS � 03.2170.4613/01.M2170

Zenith El Primero Synopsis Open Heart � BOX & PAPERS � 03.2170.4613/01.M2170

A Zenith El Primero Synopsis Open Heart watch with a 40-millimeter case diameter and gold-toned hands, featuring an open heart design and classic modern architecture.

  • Condition: Excellent, little to no visible wear
  • Case Diameter: 40mm
  • Bracelet Length: 16.5 links
  • Bracket Fit: up to 7.25 inches in circumference
Posted at
Mar 27, 2025, 2:21 PM
Active
Zenith Chronomaster - El Primero - Original - Tricolor Dial - Complete

Zenith Chronomaster - El Primero - Original - Tricolor Dial - Complete

A Zenith Chronomaster Original with a tricolor dial, featuring an automatic movement and stainless steel case.

  • Condition: Excellent
  • Case size: 38mm diameter
Posted at
Mar 27, 2025, 12:51 PM
Active