Zenith El Primero Chronomaster Open Stainless Steel / Black / Rubber

Reference 03.3300.3604/21.C822

Zenith Chronomaster Open Stainless Steel / Black / Rubber

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

Zenith El Primero “Open Heart” — Ref. 03.0520.4021 — White Dial — Full Set / Hard-to-Find

Zenith - 03.0520.4021 · $3,190

This Zenith El Primero 'Open Heart' features a rare white dial and an iconic high-beat chronograph movement with an open-heart design, allowing you to see the escapement working.

Condition: Very Good
Diameter: ~42mm
Movement Frequency: 36,000 vph

Posted at

Feb 24, 2026, 8:12 PM

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Zenith 49.9010.9004/01.R947 El Primero 21 Chrona limited edition

Zenith - 49.9010.9004/01.R947 · $10,500

This limited edition Zenith Defy El Primero 21 Chroma watch is one of only 200 pieces, dated to 2022.

Condition: Mint condition
Limited edition: 1 of 200 pieces

Posted at

Feb 23, 2026, 11:52 AM

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Neo-Vintage Gem: Zenith El Primero Chronograph - 2025 Serviced w/Extras

Zenith - 20-0010.420 · $3,350

This Zenith El Primero Chronograph is a high-end timepiece with a rich history, featuring a gold-filled case and a Zenith green ostrich leather strap.

Movement: Zenith Cal.420
Case diameter: 38mm
Lug width: 20mm

Posted at

Feb 23, 2026, 9:00 AM

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INSANE Zenith El Primero Flyback in 18K Gold Grand Chronomaster XT Ref 35.1250.4009 COLLECTOR SET!

Zenith - 35.1250.4009 · $14,950

This is a Zenith El Primero Flyback Chronomaster in 18K gold, featuring an off-white dial with guilloche work and a 43mm case.

Condition: Mint, with wear on case
Case diameter: 43mm
Dial color: off-white
Movement type: automatic chronograph

Posted at

Feb 22, 2026, 8:36 PM

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PRICE DROP! Zenith Defy Extreme Diver El Primero Sunray Blue Dial FULL SET Ref 95.9601.3620/51.I301

Zenith - 95.9601.3620/51.I301 · $7,649

A modern iteration of the Zenith El Primero diver, reimagined in titanium with a funky design and beautiful blue sunray dial.

Condition: like new
Case size: 42.5mm
Movement: El Primero cal 3620 CS

Posted at

Feb 22, 2026, 2:32 PM

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2020 Zenith Defy El Primero 21 Skeleton Chronograph 49.9000.9004/78.R582 – Full Set – $7,300 Shipped

Zenith - 49.9000.9004/78.R582 · $7,300

A high-performance chronograph showcasing Zenith’s innovative 1/100th-of-a-second movement, housed in a lightweight titanium case.

Condition: Excellent
Case size: 44mm
Case material: Titanium
Movement type: Automatic chronograph (El Primero 21, 1/100th second)

Posted at

Feb 21, 2026, 12:07 PM

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Titanium Zenith Defy El Primero 21 Skeleton Box & Papers

Zenith - 95.9000.9004/78.R582 · $70,000

The Zenith Defy El Primero 21 Skeleton is housed in lightweight titanium, featuring an open-worked skeleton dial and the in-house El Primero 9004 movement.

Condition: Great Pre-Owned condition with light signs of wear
Material: lightweight titanium
Movement: in-house El Primero 9004

Posted at

Feb 20, 2026, 11:29 AM

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

Zenith - 03.3200.3600/21.C903 · $7,050

This brand new Zenith Chronomaster Original Reverse Panda model has been discontinued by the manufacturer and comes with a full 2-year warranty.

Condition: Brand new, never used
Warranty: 2-year
Shipping method: USPS Registered Mail

Posted at

Feb 20, 2026, 8:04 AM

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Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete

Zenith - 03.2040.4061/69.C496 · $4,950

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

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