Citizen Men's Promaster Dive Eco-Drive Watch, 3-Hand Date, Polyurethane Strap, ISO Certified, Anti-Reflective Curved Crystal, Screw-Back Case and Crown

Items Description

The Citizen Men's Promaster Dive Eco-Drive Watch is a high-performance dive timepiece engineered for underwater professionals and serious enthusiasts who demand reliability at depth. This model combines a robust black stainless steel case with a green 3-hand dial featuring luminous hands and markers for superior legibility in low-light conditions. Powered by Citizen's Eco-Drive technology, the watch converts light into energy, eliminating the need for battery replacements while maintaining precision timekeeping.

 

Designed with a comfortable polyurethane strap and a screw-back case and crown, this watch delivers a water resistance rating of up to 300 meters, meeting ISO certification standards for professional diving. The anti-reflective curved crystal enhances readability underwater, while the unidirectional bezel allows divers to track elapsed time accurately. This Promaster model functions as a dependable companion for saturation diving, snorkeling, and daily wear, blending tool-watch utility with the durability of Citizen's light-powered movement.

 

Key Advantages of the Citizen Men's Promaster Dive Eco-Drive Watch, 3-Hand Date, Polyurethane Strap, ISO Certified, Anti-Reflective Curved Crystal, Screw-Back Case and Crown

 

1. Eco-Drive Light-Powered Precision

The Citizen Eco-Drive movement is the defining feature of this Promaster dive watch, converting both natural and artificial light into electrical energy stored in a lithium-ion cell. This system ensures continuous operation without routine battery changes, a practical advantage for divers who spend extended periods away from service centers.

 

• Light-Powered Charging: Recharges under any light source, from direct sunlight to indoor fluorescent lighting.
• Maintenance-Free Operation: Eliminates the need for periodic battery replacements, reducing long-term ownership costs.
• Reserve Capacity: Stores sufficient charge for continued operation when the watch is kept in darkness.
• Precision Timekeeping: Maintains quartz accuracy of approximately ±15 seconds per month.

 

2. ISO-Certified Dive Performance

The water resistance rating of 300 meters is complemented by ISO 6425 certification, which verifies the watch's suitability for professional diving activities. This standard tests not only water resistance but also the functionality of critical components such as the unidirectional bezel and luminous markings under simulated dive conditions.

 

• Water Resistance: Rated to 300 meters, suitable for saturation diving and recreational scuba use.
• Unidirectional Bezel: Prevents accidental rotation that could lead to incorrect dive time calculations.
• Luminous Markings: Apply light-absorbing material to the dial and bezel for visibility in murky water.
• Screw-Down Crown: Secures the crown to prevent water ingress during pressure changes.

 

3. Durable Construction with Anti-Reflective Curved Crystal

The case and crystal of this Promaster model are built to withstand the physical demands of underwater use. The curved mineral crystal is treated with an anti-reflective coating that reduces glare, allowing the dial to remain readable when sunlight hits the water surface at an angle. The screw-back case design adds an extra layer of protection against pressure and corrosion.

 

• Anti-Reflective Coating: Minimizes glare and reflections for clear dial viewing underwater.
• Curved Crystal: Distributes pressure more evenly than flat crystals, improving structural integrity.
• Screw-Back Case: Provides a secure seal that resists the corrosive effects of saltwater.
• Black Stainless Steel Construction: Offers corrosion resistance and resistance to scratching.

 

4. Luminous Hands and Markers for Low-Light Readability

The dial is equipped with luminous hands and hour markers that absorb light during the day and emit it in darker environments, ensuring the time remains visible during night dives or in murky conditions. The green dial color enhances contrast, making the white and luminous elements stand out clearly at a glance.

 

• Night Dive Visibility: Luminous material maintains readability in complete darkness.
• High Contrast Dial: Green background improves differentiation between hands and markers.
• Date Window: Positioned at 3 o'clock for easy reference during dive planning.

 

5. Polyurethane Strap for Comfort and Flexibility

The polyurethane strap is designed for repeated exposure to water, offering flexibility and a secure fit over a wetsuit or on bare skin. Unlike leather or fabric straps, polyurethane does not absorb water, dry quickly, and resists degradation from UV exposure and saltwater.

 

• Water-Resistant Material: Does not absorb moisture, preventing skin irritation during prolonged wear.
• Flexible Fit: Conforms to the wrist shape, accommodating changes in wrist size due to water pressure.
• Buckle Closure: Features a durable buckle that stays secure under active use.

 

The Citizen Men's Promaster Dive Eco-Drive Watch is best suited for scuba divers, snorkelers, and water sports enthusiasts who need a reliable timekeeping instrument with verified ISO certification for underwater use. For dive professionals who log frequent dives in varying conditions, the light-powered movement and corrosion-resistant construction reduce the need for regular maintenance, while the luminous dial ensures readability in challenging environments. This watch also serves as a practical choice for individuals who prefer a robust, utilitarian timepiece that transitions from the dive site to everyday activities without requiring special care.

Specifications of Citizen Men's Promaster Dive Eco-Drive Watch, 3-Hand Date, Polyurethane Strap, ISO Certified, Anti-Reflective Curved Crystal, Screw-Back Case and Crown

Brand Name	Citizen
Model number	BJ8057-09X
Part Number	BJ8057-09X
Item Shape	Round
Dial window material type	Spherical Mineral Crystal
Clasp	Buckle
Case material	Stainless Steel
Case diameter	48 millimeters
Case Thickness	18.4 millimeters
Band Material	Polyurethane
Band width	32.1 millimeters
Band Color	Green
Dial color	Green
Bezel material	Stainless Steel
Bezel function	Stationary
Calendar	Day-Date
Special features	Dive
Movement	Eco-Drive
Water resistant depth	300 Meters
Display Type	Analog

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Specifications
[Brand Name ]	Citizen
[Model number ]	BJ8057-09X
[Part Number ]	BJ8057-09X
[Item Shape ]	Round
[ Dial window material type ]	Spherical Mineral Crystal
[Clasp ]	Buckle
[Case material ]	Stainless Steel
[Case diameter ]	48 millimeters
[Case Thickness ]	18.4 millimeters
[Band Material ]	Polyurethane
[Band width ]	32.1 millimeters
[Band Color ]	Green
[Dial color ]	Green
[Bezel material ]	Stainless Steel
[ Bezel function ]	Stationary
[ Calendar ]	Day-Date
[Special features ]	Dive
[ Movement ]	Eco-Drive
[ Water resistant depth ]	300 Meters
[Display Type ]	Analog

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