Zenith El Primero Chronomaster Open Stainless Steel / Blue / Boutique Edition

Reference 03.3300.3604/51.M3300

About this watch

The Zenith Chronomaster Open Stainless Steel / Blue / Boutique Edition is a masterpiece that embodies innovation and tradition. Its stunning blue dial with sunburst finish catches the light beautifully, giving it a dynamic look that changes with your movement. The round stainless steel case measures 39.50 mm in diameter, offering a perfect balance of presence without being overly bulky. The open-heart design allows you to peek into the intricate workings of the watch, making it not just a timekeeper, but a conversation starter. With a water resistance of 100 meters, this watch is built to withstand the elements. At its core lies the Zenith caliber El Primero 3604, an automatic chronograph movement that measures time to a precision of 1/10th of a second and features a power reserve of up to 60 hours. The stainless steel case adds durability while enhancing the overall aesthetic, complemented by sapphire crystal glass that ensures scratch-resistance. Wearing the Chronomaster Open is an experience in itself, striking a perfect balance for most wrists with its comfortable fit. Whether dressing up or going casual, this watch complements any outfit due to its versatility and excellent after-sales service offered by Zenith.

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Key Features

Automatic chronograph movement (El Primero 3604)
Water resistance of 100 meters
Stainless steel case with sapphire crystal glass
Open-heart design for intricate workings visibility
Power reserve of up to 60 hours
Frequency of 36,000 vibrations per hour
Lubricant-free silicon escapement

Specifications

Brand

Zenith

Family

El Primero

Model

Chronomaster Open Stainless Steel / Blue / Boutique Edition

Reference

03.3300.3604/51.M3300

Movement Features

Hours, Minutes, Small Seconds
Chronograph, Column wheel

Case

Stainless Steel 39.5mm

Dial Color

Blue

Crystal

Sapphire

Water Resistance

100

Current Listings

[US] Zenith El Primero Chronomaster Sport - Meteorite Dial - 42mm - 03.3120.3600/76.M3100 - Full Set

Zenith - 03.3120.3600/76.M3100 · $13,300

Up for sale is a Zenith El Primero Chronomaster Sport - Meteorite Dial - 42mm Watch functions perfectly mechanically, without issue.

Condition: Fantastic condition with minor hairlines
Water Resistance: 30m
Case Size: 42mm diameter
Band Material: bracelet

Posted at

Jan 27, 2026, 8:00 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 · $7,150

A brand new Zenith Chronomaster Original Reverse Panda El Primero chronograph, discontinued by the manufacturer, still in its protective stickers and under full warranty.

Condition: Brand new, never used
Warranty: 2-year warranty from Zenith
Strap: Original leather strap with deployant clasp

Posted at

Jan 25, 2026, 4:06 PM

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Zenith El Primero Defy Extreme Diver AKA PURE WRIST JOY Ref 95.9601.3620/51.I301 FULL SET

Zenith - 95.9601.3620/51.I301 · $7,950

A Zenith El Primero Defy Extreme Diver with a unique blue starry sunray pattern dial and a titanium case.

Condition: Pre-owned, barely over a year old
Case size: 42.5MM diameter
Movement: El Primero cal 3620 CS automatic movement

Posted at

Jan 24, 2026, 7:53 PM

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Zenith El Primero Chronomaster Revival Panda 03.A384.400/21.C815

Zenith - 03.A384.400/21.C815 · $5,999

This is a 37mm Chronomaster Revival Panda, a limited edition model from Zenith's El Primero series, featuring a classic panda dial.

Condition: preowned clean condition with hairline scratches throughout
Crystal condition: may contain marks under strong magnification
Strap condition: worn
Case size: 37mm

Posted at

Jan 23, 2026, 6:51 AM

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Zenith Defy Skyline Chronograph - Full Set - El Primero 3600 - $9,200

Zenith - 03.9500.3600/01.I001 · $9,200

The Zenith Defy Skyline Chronograph features a silver 'starry sky' dial, a 1/10th-second chronograph with a central chrono hand that makes one full lap every 10 seconds, and a versatile design with a quick-change system for the bracelet and strap.

Condition: Excellent overall Condition
Movement: Zenith El Primero 3600 (5Hz / 36,000 vph) with 1/10th-second chronograph
Case size: 42mm diameter
Bracelets/straps: Steel bracelet and green rubber strap with Zenith quick-change

Posted at

Jan 20, 2026, 7:23 PM

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