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

Brand New 2025 Zenith Chronomaster Original El Primero Chronograph Reverse Panda | 03.3200.3600/21.C903 | Price reduced

Zenith - 03.3200.3600/21.C903 · $6,800

A brand new, discontinued Zenith Chronomaster Original Reverse Panda chronograph watch, still in its original packaging and with a full 2-year warranty.

Condition: Brand new, never used
Material: leather
Strap size: unknown
Warranty duration: 2 years

Posted at

May 14, 2026, 11:52 AM

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Zenith Defy El Primero 21 • Titanium • Skeleton • Full Set • Serviced

Zenith - Defy El Primero 21

This listing is about a Zenith Defy El Primero 21 watch with a titanium case, skeleton design, and full set. It has been serviced.

Condition: Full set
Material: titanium
Movement: El Primero 21

Posted at

May 14, 2026, 10:03 AM

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[US] Zenith El Primero Chronomaster Sport - White Dial - 41mm - 03.3100.3600/69.M3100 - Full Set

Zenith - 03.3100.3600/69.M3100 · $7,500

Up for sale is a Zenith El Primero Chronomaster Sport - White Dial - 41mm that functions perfectly mechanically without issue.

Condition: Fantastic with few hairlines on clasp, case, and bracelet
Case size: 41mm diameter

Posted at

May 14, 2026, 7:25 AM

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Neo Vintage French Military Zenith El Primero Flyback Chronograph Ref 02.0470.405/25 FULL COLLECTOR SET

Zenith - 02.0470.405/25 · $4,250

This is a unique Neo Vintage French Military Zenith El Primero Flyback Chronograph, featuring a matte black dial and stainless case. The watch comes in a collector's box and papers set, including an original serialized hang tag.

Condition: really nice condition, with wear throughout
Case size: 40mm diameter
Bracelet length: fits up to app 7 inches
Movement type: automatic chronograph with quickset date winding

Posted at

May 11, 2026, 8:57 PM

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Zenith Defy Skyline Chrono Silver - El Primero - Full Set 2024 - Integrated Bracelet & Green Strap w/ Deployant - $7,750

Zenith - 03.9500.3600/01.I001 · $7,750

This is a Zenith Defy Skyline Chronograph, featuring the El Primero 3600 movement that beats at 36,000 vph and drives a 1/10th-second chronograph hand. The watch has a 42mm stainless steel case and a silver dial with a 'Starry Sky' pattern.

Condition: Excellent
Movement: El Primero 3600, automatic chronograph
Frequency: 36,000 vph (5Hz)
Power reserve: 60 hours

Posted at

May 11, 2026, 11:46 AM

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Ultra Rare Zenith El Primero Tourbillon Chronograph in 18K White Gold - Just 50 Made - Collector Set

Zenith - 65.1260.4005/21.C505 · $20,850

The Zenith El Primero is a legendary chronograph featuring an incredible tourbillon and limited to just 50 pieces. The watch is housed in 18k white gold and features a beautiful black dial highlighting the tourbillon.

Condition: Really clean condition, minimal wear throughout
Case diameter: 45mm
Movement: El Primero automatic chronograph cal 4005
Strap material: Zenith black leather strap

Posted at

May 10, 2026, 11:09 PM

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Zenith Tipo CP-2 Chronograph 03.2240.4069, Underrated El Primero Beast (641/1000)

Zenith - 03.2240.4069 · $4,150

Inspired by original Cairelli-issued military chronographs, this Zenith Tipo CP-2 Chronograph features a strong vintage tool watch character with a matte black dial and bold lume markers.

Condition: great, with light signs of normal wear
Case size: 43mm diameter
Movement: Zenith El Primero automatic chronograph (Cal. 4069)
Water resistance: 100m depth rating

Posted at

May 8, 2026, 8:40 PM

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