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
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- Case Size: 46mm
- Movement: Zenith Calibre El Primero 4000 SC
- Case Condition: visible scratches on sides and lugs

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- Condition: Mint Condition with light hairline scratches only
- Case size: 42mm diameter
- Water resistance: 30m depth rating

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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

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- Condition: Excellent
- Case size: 38mm diameter

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

Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete
This is a Zenith El Primero Chronomaster Open Heart chronograph watch, featuring a 42mm stainless steel case and powered by the Caliber Zenith El Primero 4061 movement.
- Condition: Mint Condition with light hairline scratches
- Case diameter: 42mm
- Movement frequency: 36,000 VPH
- Power reserve: 50 hour PR
Zenith Class Sport El Primero Chronograph Black Dial Hand Wound 02.0500.420
This Zenith Class Sport El Primero Chronograph is a hand-wound mechanical watch with a black dial and stainless steel case.
- Condition: 95%
- Size: 39mm diameter
- Function: Chronograph ; date

Zenith Grande Class Open El Primero Chrono Power Reserve 03.0520.4021, Black B&P
This Zenith Grande Class Open El Primero Chronograph features an in-house movement, chronograph function, power reserve indicator, and is water resistant to 50m.
- Condition: Good condition, some wear on the strap and a small blemish on the sapphire crystal
- Movement: Automatic, in-house Zenith 4021H
- Base movement: Zenith El Primero 400
- Alternations per hour: 36,000

ZENITH CHRONOMASTER SPORT El PRIMERO YOSHIDA GREEN DIAL LIMITED EDITION 2024
The Zenith Chronomaster Sport Yoshida 'Hulk Edition' features a stainless steel case with a green ceramic bezel and dial, powered by the El Primero Caliber 3600.
- Condition: Mint, Unpolished Condition
- Limited edition: 1 of 244 pieces
- Case material: stainless steel
- Bracelet material: stainless steel