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

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  • Condition: Honest wear consistent with careful ownership
  • Movement: Zenith El Primero automatic movement
  • Case material: Titanium
  • Bezel material: Polished steel
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  • Condition: Vintage good condition, lightly worn
  • Case size: ~36mm x 44mm
  • Diameter: 40-45mm diameter
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May 27, 2026, 9:02 AM
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  • Condition: Brand new, never used
  • Material: leather
  • Strap type: deployant clasp
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  • Condition: Excellent condition
  • Case size: 44mm
  • Case material: Titanium
  • Dial condition: Brand new condition
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The Zenith Tipo CP-2 Chronograph is a vintage-style chronograph inspired by military designs, featuring a matte black dial and bold lume markers.

  • Condition: Great condition, showing only light signs of normal wear
  • Case size: 43mm diameter
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  • Power reserve: 50 hour power reserve
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  • Condition: Fantastic condition with few hairlines on clasp, case, and bracelet
  • Case Size: 41mm diameter
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  • Condition: preowned clean condition with minor hairline scratches
  • Service History: unknown
  • Shipping: FREE 2 Day Insured FedEx Shipping
  • Returns: NO RETURNS
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  • Condition: Mint
  • Diameter: 42mm
  • Case material: Stainless Steel
  • Bracelet material: Stainless Steel
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