Citizen Watch Promaster PROMASTER NB6021-68L Marine Series Mechanical Diver 200m Metal Band

Items Description

The Citizen Watch Promaster PROMASTER NB6021-68L Marine Series Mechanical Diver 200m Metal Band is a mechanical diver's watch designed for underwater enthusiasts and daily wearers who value precision engineering. This timepiece is powered by Citizen's Calibre 9051 automatic movement, which delivers reliable timekeeping with a power reserve of approximately 42 hours. The watch draws design inspiration from the iconic Fujitsubo (barnacle) silhouette, a nod to Citizen's rich heritage in professional dive instrumentation.

 

The 41mm case is crafted from Super Titanium with Duratect surface hardening, offering a balance of lightweight comfort and scratch resistance. A sapphire crystal with anti-reflective coating protects the deep blue dial, ensuring legibility in bright sunlight and murky underwater conditions. With a water resistance rating of 200 metres, this watch meets ISO standards for professional diving and is equally at home in the boardroom, making it a versatile addition to any collection.

 

Key Advantages of the Citizen Watch Promaster PROMASTER NB6021-68L Marine Series Mechanical Diver 200m Metal Band

 

1. Reinforced Automatic Movement for Reliable Performance

The Calibre 9051 automatic movement inside the NB6021-68L provides self-winding operation with a hand-winding option, giving users flexibility in how the watch is powered. Its anti-magnetic properties protect against everyday magnetic fields, such as those from smartphones and appliances, helping maintain accuracy over time.

 

• Power Reserve: Approximately 42 hours when fully wound.
• Frequency: 28,800 vibrations per hour for smooth, precise timekeeping.
• Stop Second Function: Allows for precise time synchronization when setting the watch.
• Anti-Magnetic Rating: Reinforced against common magnetic interference.

 

2. Super Titanium Construction with Duratect Hardening

Citizen's proprietary Super Titanium material makes this diver significantly lighter than standard stainless steel while offering greater scratch resistance. The Duratect treatment further hardens the surface, preparing the case for the knocks and scrapes that come with active use. The metal bracelet follows the same Super Titanium construction, providing durability without adding excessive weight to the wrist.

 

• Lightweight Comfort: Weighs just 119 grams, suitable for all-day wear.
• Scratch Resistance: Duratect hardened surface resists daily wear marks.
• Hypoallergenic Properties: Titanium is gentle on sensitive skin.
• Metal Bracelet: Equipped with a secure clasp for a stable fit during activity.

 

3. Professional Dive-Grade Water Resistance

Rated to 200 metres (20 bar), this watch is certified for scuba diving and marine sports, not just surface swimming. The screw-down crown and case back work together to prevent water ingress, while the unidirectional rotating bezel allows divers to track elapsed time safely underwater. The luminous markers and hands remain readable in low-light environments, a critical feature for underwater navigation.

 

• Water Resistance: 200m / 20 bar, suitable for professional marine use.
• Screw-Down Crown: Provides a secure seal against water intrusion.
• Unidirectional Bezel: Prevents accidental rotation that could misread dive times.
• Luminous Indices: Enhanced visibility in dark dive conditions.

 

4. Sapphire Crystal with Anti-Reflective Coating

The sapphire crystal protecting the blue dial offers excellent scratch resistance, ranking high on the Mohs scale of mineral hardness. An anti-reflective coating reduces glare, allowing the dial to be read clearly from multiple angles. This combination makes the watch practical for outdoor activities where direct sunlight is common, as well as underwater where clarity is essential.

 

• Crystal Material: Scratch-resistant sapphire, ideal for rugged environments.
• Anti-Reflective Coating: Minimises glare for better readability.
• Dial Protection: Maintains clarity under demanding conditions.
• Legibility: Designed for quick reading in all lighting scenarios.

 

5. Deep Blue Dial with Fusion of Heritage and Modern Style

The blue dial of the NB6021-68L reflects the ocean depths that inspired its design, offering a vibrant yet professional appearance. The dial texture and applied indices provide depth and character, while the date window at 3 o'clock adds everyday practicality. This visual identity connects the watch to Citizen's Fujitsubo heritage, where function meets a distinctly athletic aesthetic suited for both casual and formal settings.

 

• Dial Colour: Blue, reminiscent of marine environments.
• Date Display: Positioned at 3 o'clock for quick reference.
• Design Inspiration: Fujitsubo styling with modern execution.
• Versatility: Pairs well with both wetsuits and business attire.

 

The Citizen Watch Promaster PROMASTER NB6021-68L Marine Series Mechanical Diver 200m Metal Band offers a combination of professional-grade dive capability and practical everyday comfort. Its automatic movement, Super Titanium case, and 200-metre water resistance make it a dependable companion for those who spend time on or under the water, while the refined blue dial ensures it transitions smoothly into daily life.

 

For scuba divers, snorkellers, or anyone who appreciates a well-engineered mechanical timepiece, the NB6021-68L provides the essential features needed for marine activities without compromising on style or robustness.

Specifications of Citizen Watch Promaster PROMASTER NB6021-68L Marine Series Mechanical Diver 200m Metal Band

Brand Name	Citizen
Model number	NB6021-68L
Part Number	NB6021-68L
Item Shape	Round
Dial window material type	Sapphire Crystal
Clasp	Push Button Deployment Clasp
Case material	Titanium
Case diameter	41 millimeters
Case Thickness	12.3 millimeters
Band Material	Titanium
Band width	20 millimeters
Band Color	Silver
Dial color	Blue
Bezel material	Titanium
Bezel function	Calendar
Calendar	Date
Movement	Japanese Quartz
Water resistant depth	200 Meters
Display Type	Analog

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Specifications
[Brand Name ]	Citizen
[Model number ]	NB6021-68L
[Part Number ]	NB6021-68L
[Item Shape ]	Round
[ Dial window material type ]	Sapphire Crystal
[Clasp ]	Push Button Deployment Clasp
[Case material ]	Titanium
[Case diameter ]	41 millimeters
[Case Thickness ]	12.3 millimeters
[Band Material ]	Titanium
[Band width ]	20 millimeters
[Band Color ]	Silver
[Dial color ]	Blue
[Bezel material ]	Titanium
[ Bezel function ]	Calendar
[ Calendar ]	Date
[ Movement ]	Japanese Quartz
[ Water resistant depth ]	200 Meters
[Display Type ]	Analog

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