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

Reference 03.3300.3604/51.M3300

Zenith Chronomaster Open Stainless Steel / Blue / Boutique Edition

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

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

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

Zenith - 03.3100.3600/69.M3100 · $7,550
Up for sale is a Zenith El Primero Chronomaster Sport with a white dial and 41mm case, featuring a perfectly working mechanical movement.

  • Condition: Fantastic condition with few hairlines on clasp, case, and bracelet
  • Diameter: 41mm
  • Case Condition: few hairlines on clasp, case, and bracelet
Posted at
Apr 17, 2026, 6:30 AM
Active
View listing on r/WatchExchange
[WTS] Zenith “Open Heart” - El Primero Movement - Price Reduced

Zenith “Open Heart” - El Primero Movement - Price Reduced

Zenith - 03.0520.4021 · $2,550
A Zenith El Primero automatic chronograph with an open-heart design and a rare white dial variant.

  • Condition: Very Good
  • Movement Type: El Primero high-beat automatic chronograph (36,000 vph)
  • Case Size: ~42 mm diameter
  • Crystal Type: Sapphire crystal
Posted at
Apr 16, 2026, 8:32 PM
Active
View listing on r/WatchExchange
[WTS] 1970 Zenith El Primero A385 Chronograph - $7,250

1970 Zenith El Primero A385 Chronograph - $7,250

Zenith - A385 · $7,250
This Zenith El Primero A385 is a limited edition chronograph from the late 1960s and early 1970s, featuring an automatic movement that was historically significant for its time. It has been well maintained and is in excellent condition with minimal signs of wear.

  • Condition: Excellent
  • Movement caliber: 3019 PHC/400
  • Case dimensions: [object Object]
  • Power reserve: 50 hours
Posted at
Apr 16, 2026, 8:05 PM
Active
View listing on r/WatchExchange
[WTS] Zenith El Primero Chronomaster Revival Shadow 97.T384.4061/21.C822 ( excellent / 2022 / box and papers )

Zenith El Primero Chronomaster Revival Shadow 97.T384.4061/21.C822 ( excellent / 2022 / box and papers )

Zenith - 97.T384.4061/21.C822 · $5,995
Up for sale is an excellent condition Zenith El Primero Chronomaster Revival Shadow, complete with all boxes, papers, and booklets.

  • Condition: Excellent
  • Case material: Titanium
  • Case size: 37mm
  • Movement: El Primero
Posted at
Apr 16, 2026, 12:24 PM
Active
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[WTS] Zenith Defy El Primero 21 $5050

Zenith Defy El Primero 21 $5050

Zenith - Defy El Primero 21 · $5,050
A Zenith El Primero 21 is being sold to fund a Credor purchase during the seller's Japan trip.

  • Condition: Moderate wear, light scratches
Posted at
Apr 13, 2026, 7:32 PM
Active
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[WTS] Rare Zenith El Primero Captain Winsor Annual Calendar Rose Gold w/ Diamond Markers + Silvered Dial

Rare Zenith El Primero Captain Winsor Annual Calendar Rose Gold w/ Diamond Markers + Silvered Dial

Zenith - El Primero Captain Winsor Annual Calendar · $24,800
This listing is for a rare Zenith El Primero Captain Winsor Annual Calendar Rose Gold w/ Diamond Markers + Silvered Dial.

  • Diameter: 44mm
Posted at
Apr 13, 2026, 6:00 PM
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[WTS] Zenith Chronomaster Original El Primero Chronograph Reverse Panda | 03.3200.3600/21.C903 | Brand New with Full Zenith warranty

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

Zenith - 03.3200.3600/21.C903 · $6,999
A brand new Zenith Chronomaster Original Reverse Panda, a discontinued model still in its protective stickers.

  • Condition: Brand new, never used
  • Case size: not specified
  • Water resistance: not specified
  • Strap material: leather
Posted at
Apr 13, 2026, 8:56 AM
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[WTS] Ultra Rare Zenith El Primero Tourbillon Chronograph in 18K White Gold - Collector Set - JUST 50 MADE!

Ultra Rare Zenith El Primero Tourbillon Chronograph in 18K White Gold - Collector Set - JUST 50 MADE!

Zenith - 65.1260.4005/21.C505 · $21,250
The Zenith El Primero Tourbillon Chronograph is a legendary watch featuring a tourbillon and chronograph functions in a limited edition of just 50 pieces. It comes in a beautiful collector set including an appraisal from Zenith showing a value of six figures.

  • Condition: Really clean condition, including the sapphire crystal.
  • Movement Type: El Primero automatic chronograph cal 4005
  • Case Material: 45MM 18K solid white gold
  • Case Dimensions: 45mm diameter
Posted at
Apr 12, 2026, 9:52 PM
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[WTS] Zenith El Primero Chronomaster Sport Titanium Full Box & Cards Set Ref 95.3100.3600/39.M3100

Zenith El Primero Chronomaster Sport Titanium Full Box & Cards Set Ref 95.3100.3600/39.M3100

Zenith - 95.3100.3600/39.M3100 · $8,650
This is a 2-year-old Zenith El Primero Chronomaster Sport Titanium watch with a gray dial and tri-colored chrono sub-dials. It features a 41mm full titanium case and an iconic chronograph movement.

  • Condition: like new, with some light wear on the titanium bezel and case sides
  • Case size: 41mm diameter
  • Movement type: automatic
  • Depth rating: 30m water resistance
Posted at
Apr 12, 2026, 8:32 PM
Active
View listing on r/WatchExchange