Citizen Promaster Sea BJ7128-08E, 44mm, Black Dial
Citizen Promaster Sea 44mm, Black Dial
Citizen Promaster Sea BJ7128-08E is a men's solar dive watch featuring a 44mm stainless steel case, 200m water resistance, and dual time.
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About this item
- Citizen Eco-Drive Promaster Sea Dive watch
- Features dual time zone and date display
- Durable stainless steel case with mineral crystal
- Water resistant up to 200 metres
- Equipped with a comfortable black polyurethane strap
Top Highlights
- Brand
- Citizen
- Model Name
- Promaster
- Model Number
- BJ7128-08E
- Department
- Men
- Item Type
- Watch
- Manufacturer
- Citizen
- Country of Origin
- Japan
- First Available
- 2 December 2024
Features & Specs
- Display
- Analog
- Movement Type
- Solar
- Calibre
- B877
- Power Source
- Light Powered
- Additional Features
- Water-resistant
- Complications
- GMT, Date
- Battery
- No battery (solar)
- Strap Type
- Strap
- Case Material
- Stainless steel
- Case Size
- 44.0 mm
- Case Thickness
- 13.5 mm
- Lug Width
- 22.0 mm
- Weight
- 680.4 g
- Water Resistance
- 200 m
- Sport Type
- Walking
- Strap
- Polyurethane
- Clasp
- Buckle
- Closure Type
- Buckle
- Crystal
- Mineral crystal
Style
- Style Name
- Classic
- Dial Shape
- Round
- Dial Colour
- Black
- Band Color
- Black
- Face Style
- Crosshair
- Collection
- Promaster Sea
Will it fit your wrist?
Best on 18.5–19.5 cm (7.3–7.7 in) wrists
A 44 mm case sits just right on these wrists. If your wrist is 19.5–20.5 cm, it looks smaller and more understated. If your wrist is 17.5–18.5 cm, it looks bigger and bolder.
Measure your wrist and see what fitsA rough guide based on case diameter only.
Is this watch big or small?
61% of the men's watches we list are smaller than this one
The most common men's size is 42 mm (173 models). 141 models are 44 mm, like this one.
All our watch size dataDescription
The Citizen Promaster Sea BJ7128-08E is a robust men's solar dive watch, part of the renowned Promaster Sea collection, designed for adventurers and daily wearers alike. This timepiece combines practical functionality with a durable build, making it a reliable companion for various aquatic and terrestrial activities. It appeals to individuals seeking a dependable watch with a strong aesthetic.
At its core, this model features Citizen's proprietary Eco-Drive solar movement, ensuring continuous operation without the need for battery changes, powered solely by light. Encased in stainless steel, its 44mm diameter houses a clear mineral crystal protecting the black dial. With an impressive 200-metre water resistance, it is well-suited for serious swimming and recreational diving.
Beyond its core specifications, the BJ7128-08E offers practical complications including a dual time zone display and a date function, enhancing its utility for travellers. The comfortable black polyurethane strap ensures a secure fit on the wrist, and its classic round dial shape and bold markers provide excellent legibility. This watch is a testament to Citizen's commitment to accessible, high-performance timekeeping.
Frequently Asked Questions
How deep can I go with the Citizen Promaster Sea BJ7128-08E?
The Citizen Promaster Sea BJ7128-08E offers a robust 200 metres of water resistance, making it suitable for recreational diving, snorkelling, and serious swimming. While it's highly capable for most water activities, it is not officially ISO 6425 certified for saturation diving.
What type of movement powers this Citizen Promaster Sea watch?
This Promaster Sea model is powered by Citizen's innovative Eco-Drive solar movement. This technology converts any light source into energy, storing it in a rechargeable cell, ensuring the watch runs continuously without the need for traditional battery replacements.
Is the BJ7128-08E resistant to magnetic fields?
The Citizen Promaster Sea BJ7128-08E is designed for durability and performance, but specific details regarding its resistance to strong magnetic fields are not provided. Most modern watches offer some level of magnetic protection, but for extreme environments, specialised antimagnetic watches are recommended.
What wrist size is suitable for the Citizen Promaster Sea BJ7128-08E?
With its 44mm case diameter and 22mm lug width, the Citizen Promaster Sea BJ7128-08E generally fits a wide range of wrist sizes, typically from 6.5 to 8 inches (16.5 to 20 cm). The polyurethane strap offers flexibility for a comfortable fit on most men's wrists.
How often should I service my Eco-Drive Promaster Sea watch?
Eco-Drive watches like the Promaster Sea BJ7128-08E are known for their low maintenance. While they don't require battery changes, it's generally recommended to have the water resistance seals checked every 2-3 years, especially if frequently exposed to water, to maintain its 200m water resistance.
Editor's take
The Citizen Promaster Sea BJ7128-08E represents a compelling offering within the accessible dive watch segment, particularly for those who appreciate solar-powered reliability. As part of the esteemed Promaster Sea collection, this timepiece is crafted for the active individual, blending robust construction with practical features suitable for both underwater exploration and everyday urban wear. It embodies Citizen's philosophy of delivering high-performance instruments without compromise.
Powering this watch is Citizen's renowned Eco-Drive movement, a testament to sustainable horology, which harnesses any light source to keep the watch running indefinitely. The substantial 44mm stainless steel case provides a commanding presence on the wrist, while the mineral crystal offers commendable shatter resistance. Its 200-metre water resistance ensures it is more than capable for recreational diving and serious water sports.
One might consider the use of a mineral crystal rather than sapphire as a point of discussion for a dive watch of this calibre. While mineral offers good impact resistance, it is more susceptible to scratches compared to sapphire, which is often preferred for its superior scratch-proofing in more premium dive watches. This is a trade-off that keeps the watch within an accessible price point, but it's a factor for those prioritising ultimate durability.
Ultimately, the BJ7128-08E is an excellent choice for enthusiasts seeking a dependable, low-maintenance dive watch with a strong feature set, including dual time functionality. It’s particularly well-suited for those who value the convenience of Eco-Drive technology and a robust build for daily adventures. For those requiring ISO 6425 certification or a sapphire crystal, exploring other Promaster models or stepping into a higher price bracket might be worthwhile.
In categories
From the manufacturer

Promaster Diver's Capability
The Citizen Promaster BJ7128-08E is engineered for aquatic environments. Its robust 44.0mm stainless steel case and 200m water resistance rating ensure reliable performance during diving activities. A mineral crystal protects the dial from impacts.

Eco-Drive Solar Power
This Promaster model utilises Citizen's proprietary solar movement, eliminating the need for battery replacements. Light energy, from any source, continuously powers the watch, providing consistent and accurate timekeeping. This technology ensures enduring operational efficiency.
THE DETAILS
The BJ7128-08E features a 44.0mm stainless steel case, paired with a durable polyurethane strap for secure wear. Its solar movement provides continuous operation, while the mineral crystal offers essential dial protection. Water resistance is rated at 200 metres.

OWN YOUR STYLE- DISCOVER MORE
The Promaster BJ7128-08E offers a purposeful design suitable for various applications. Its technical specifications and robust construction provide a dependable instrument for daily wear and demanding conditions. This timepiece integrates functionality with a distinct aesthetic.

CITIZEN PARTNERSHIPS
The official timepiece partner of Disney parks, run Disney sponsorship, events and more.
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