Zenith El Primero Chronomaster Open Stainless Steel / Silver / Bracelet

Reference 03.3300.3604/69.M3300

About this watch

When it comes to luxury watches, few brands command respect like Zenith. Renowned for its precision and craftsmanship, Zenith has introduced the Chronomaster Open Stainless Steel / Silver / Bracelet (Model: 03.3300.3604/69.M3300). This stunning timepiece is not just a watch; it's a statement. Let’s dive into the intricacies of this remarkable watch and see what makes it a standout in the world of horology. The Zenith Chronomaster Open boasts a beautifully crafted stainless steel case with a diameter of 39.50 mm, striking a perfect balance between presence and wearability. The sunburst finish gives it a striking appearance, reflecting light in a way that catches the eye without being overly flashy. The stainless steel bracelet enhances the watch's elegance while ensuring durability. It feels solid on the wrist, yet comfortable enough for daily wear. The design is both modern and classic, making it versatile enough to pair with various outfits. The dial of this watch is where the magic truly happens. The open heart design allows you to glimpse the inner workings of the watch, showcasing the exquisite craftsmanship of the El Primero movement. The silver color provides a clean and sophisticated look, while the stick and dot indexes add a touch of modernity. The hands are also designed with precision in mind; they’re stick-shaped, ensuring readability while maintaining an elegant aesthetic. The central chronograph hand is particularly noteworthy, making one full turn every 10 seconds, which is a unique feature that adds to the watch's sporty character. What sets the Chronomaster Open apart is its movement. The El Primero 3604 is a modified version of the 3600 that debuted in the CHRONOMASTER Sport. It’s an automatic chronograph that can measure and display time down to the 1/10th of a second. With a frequency of 36,000 vibrations per hour, the 3604 offers a level of precision that is hard to match. The movement features a stop-second mechanism, allowing you to set the time accurately, which is essential for a watch of this caliber. The El Primero 3604 boasts an impressive power reserve of 60 hours. This means you can take it off for a weekend and still find it ticking away when you put it back on. The automatic winding mechanism is efficient, utilizing a lubricant-free silicon escape wheel and pallet lever, which minimizes maintenance and enhances durability. With a water resistance of 100 meters, the Zenith Chronomaster Open is not just a pretty face. It’s built to withstand splashes and even brief swims. Whether you’re caught in a rain shower or enjoying a day at the beach, you can trust this watch to keep ticking without missing a beat.
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Key Features

  • Automatic chronograph movement (El Primero 3604)
  • Stainless steel case with sunburst finish
  • Sapphire crystal glass
  • 100m water resistance
  • 60-hour power reserve
  • Stop-second mechanism for accurate time-setting
  • High-frequency movement with 1/10th of a second chronograph

Specifications

Brand
Zenith
Family
El Primero
Model
Chronomaster Open Stainless Steel / Silver / Bracelet
Reference
03.3300.3604/69.M3300
Movement Features
  • Hours, Minutes, Small Seconds
  • Chronograph, Column wheel
Case
Stainless Steel 39.5mm
Dial Color
Silver
Crystal
Sapphire
Water Resistance
100

Current Listings

[WTS] Zenith Chronomaster Open White Full Kit 39mm

Zenith Chronomaster Open White Full Kit 39mm

Up for sale is my Zenith Chronomaster Open in the current 39mm model, which is pristine and comes with full box, papers, and links.

  • Condition: Mint condition
  • Case size: 39mm diameter
Posted at
Nov 28, 2025, 9:30 AM
Active
[WTS] Zenith El Primero Captain Chronograph Rose Gold Two-tone

Zenith El Primero Captain Chronograph Rose Gold Two-tone

This beautifully crafted Zenith Captain Chronograph features a rose gold and steel combination, excellent finishing throughout, and comes with various accessories.

  • Condition: Excellent
  • Material: Steel and 18K rose gold
  • Case diameter: 40mm
  • Strap material: Alligator leather
Posted at
Nov 30, 2025, 1:59 PM
Active
[WTS] Zenith El Primero Chrono Sport black dial full kit $7099

Zenith El Primero Chrono Sport black dial full kit $7099

This Zenith El Primero Chrono Sport features a black dial, 41mm case size, and the legendary El primero movement with 1/10th second chronograph abilities.

  • Condition: Very slight scratches along bracelet, specifically clasp area; One scratch near micro adjust easily buffed out
  • Msrp: $11,800
  • Water resistance: 10atm
  • Frequency: 36000/5 Hz
Posted at
Nov 26, 2025, 9:33 PM
Active
[WTS] ZENITH El Primero Stratos Chronograph Spindrift Rose Gold

ZENITH El Primero Stratos Chronograph Spindrift Rose Gold

A rare Zenith El Primero Stratos Spindrift in 18k rose gold with titanium details, made to collaborate with the Spindrift yacht racing team. The watch features a DLC black ultralight titanium bezel, pushers, and crown, along with an 18k rose gold case and gold plated indices.

  • Condition: Very Good
  • Case material: 18k rose gold
  • Band material: Black rubber with Nomex fabric coating
Posted at
Nov 26, 2025, 8:26 PM
Active
[WTS] 2022 Zenith Defy El Primero 21 Blue Skeleton Titanium 95.9002.9004 Full Set

2022 Zenith Defy El Primero 21 Blue Skeleton Titanium 95.9002.9004 Full Set

Zenith - 95.9002.9004 · $7,500
2022 Zenith Defy El Primero 21 Blue Skeleton Titanium, a 1/10th second chronograph with a 44mm titanium case.

  • Condition: has some scratches on bracelet and case
  • Case material: titanium
  • Bracelet condition: some scratches
  • Size: 44mm diameter
Posted at
Nov 26, 2025, 7:48 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
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 with a 42mm stainless steel case, featuring a Caliber Zenith El Primero 4061 movement and a date of manufacture in October 2014.

  • Condition: Mint Condition
  • Case diameter: 42mm
  • Movement frequency: 36,000 VPH
Posted at
Mar 25, 2025, 12:45 PM
Active