Citizen Refreshes the Promaster Marine Collection with Four New Eco-Drive Dive Watches

The Japanese watchmaker introduces a new-generation Eco-Drive movement, sustainable strap material, and versatile 40.6mm sizing for its latest Promaster Marine lineup.

Citizen continues to strengthen its Promaster collection in 2026, unveiling four new Promaster Marine dive watches that combine practical everyday wearability with genuine diving credentials. While the design remains familiar, the biggest story lies beneath the dial, where Citizen debuts its all-new Eco-Drive Caliber E118 an upgraded solar-powered movement offering significantly improved efficiency and a full year of power reserve.

Launching in Japan on July 16, 2026, the new collection includes four references: BN0265-00A, BN0266-07E, BN0267-04L, and BN0268-01E. Priced at ¥69,300 (approximately $426 USD), these watches target buyers looking for a reliable, affordable dive watch backed by one of the industry's most trusted names in solar-powered technology.

 

A More Wearable Size for Everyday Divers

One of the strongest selling points of the new collection is its balanced proportions.

Citizen has chosen a 40.6mm stainless steel case, paired with an 11.7mm thickness, making these watches noticeably more wearable than many oversized dive watches currently on the market. At only 86 grams, they're also surprisingly lightweight, especially considering their professional diving specifications.

The case follows the classic Promaster formula with:

• Unidirectional rotating dive bezel
• Screw-down crown
• Date display at 3 o'clock
• Large applied luminous markers
• High-visibility hands
• 200-meter water resistance

The sizing feels particularly well suited for enthusiasts who want a capable dive watch that can transition easily from the beach to the office without feeling bulky on the wrist.

 

The Real Upgrade: Eco-Drive Caliber E118

While the exterior changes are relatively subtle, the movement represents a meaningful step forward.

The new Eco-Drive Caliber E118 replaces Citizen's previous generation movement with notable improvements in efficiency. A full charge now delivers approximately one year of operation, effectively doubling the six-month reserve offered by many earlier Eco-Drive dive models.

Citizen also rates the movement at ±15 seconds per month, maintaining the dependable accuracy Eco-Drive owners have come to expect.

Perhaps more interesting is Citizen's claim that the improved energy efficiency allows for richer and more vibrant dial colors, giving designers greater flexibility without compromising power consumption. While this benefit may not be immediately obvious in official images, it opens interesting possibilities for future Promaster releases.

 

Four Colorways, Four Different Personalities

Citizen has introduced four distinct versions, each offering a different look without changing the core specifications.

BN0265-00A

This version combines a crisp white dial with a black bezel and olive green BENEBiOL strap. It delivers a clean, modern appearance that stands apart from the sea of black-dial dive watches currently available.

BN0266-07E

The stealthiest option in the collection features an all-black configuration, pairing a black dial, bezel, and matching strap for a classic tool-watch aesthetic.

BN0268-01E

For buyers wanting something more adventurous, Citizen offers a bold orange bezel and strap alongside a black dial. The color combination immediately recalls vintage professional dive watches designed for maximum underwater visibility.

BN0267-04L

Arguably the standout of the collection, this reference features a blue gradient dial complemented by a navy bezel and matching strap. The subtle sunburst gradient adds visual depth while remaining versatile enough for everyday wear.

 

Sustainable Materials Join the Promaster Line

Citizen continues to expand its use of environmentally conscious materials by fitting every new model with a strap made from BENEBiOL™, a plant-derived biomass urethane developed by Mitsubishi Chemical Group.

Unlike traditional rubber straps, BENEBiOL offers improved resistance to UV exposure and seawater while reducing dependence on petroleum-based materials. Citizen has already introduced the material on several recent Promaster releases, including the Wave Tracker series, making its inclusion here part of the brand's broader sustainability strategy.

 

Built for Real Diving

Despite their accessible price, these aren't fashion divers pretending to be professional tools.

Each watch offers:

• 200 meters of water resistance
• Type 1 magnetic resistance
• Luminous hands and markers
• Unidirectional timing bezel
• Eco-Drive solar charging
• Lightweight stainless steel construction

One specification that may divide enthusiasts is the use of mineral crystal rather than sapphire. While mineral glass offers good impact resistance and helps keep the retail price competitive, many buyers in today's market increasingly expect sapphire at this price point.

Still, Citizen has consistently built its reputation around reliability rather than luxury specifications, and many Promaster owners value durability over premium materials alone.

 

How the New Models Compare to Previous Promaster Divers

Citizen already offers one of the most extensive dive watch catalogs in the industry, ranging from affordable Eco-Drive models to ISO-certified professional saturation divers.

Compared to larger 44mm Promaster divers, these new references feel noticeably more universal. The slimmer profile and reduced diameter should appeal to collectors with smaller wrists or those seeking a comfortable everyday sports watch.

That said, some long-time Promaster fans may feel these watches play things a little too safely. Unlike the instantly recognizable "Fugu" series or Citizen's titanium Fujitsubo divers, the new Marine models lean toward a more conventional dive watch design that blends into an already crowded market.

For newcomers, however, that simplicity may actually be part of the appeal.

 

Pricing and Availability

Citizen has confirmed that all four references will launch in Japan on July 16, 2026, with a retail price of ¥69,300, or roughly $426 USD.

Although no official international release schedule has been announced, Promaster models traditionally expand into additional markets over time, making a wider global launch likely in the coming months.

 

Final Thoughts

Citizen hasn't reinvented the dive watch with its latest Promaster Marine collection—but it didn't necessarily need to.

Instead, the brand has focused on refining what already works: practical dimensions, dependable solar technology, improved efficiency, and sustainable materials. The introduction of the Eco-Drive Caliber E118 is arguably the biggest advancement, offering a meaningful improvement in daily usability without increasing complexity or cost.

While some enthusiasts may wish Citizen had paired the new movement with a more distinctive case design, the formula remains compelling. For buyers seeking an affordable, maintenance-free dive watch from one of the pioneers of solar-powered horology, these four new Promaster Marine models continue Citizen's reputation for delivering exceptional value in the entry-level dive watch segment.