Citizen Promaster BN1024-01E – Eco-Drive professional dive watch

Side view of the Citizen Promaster BN1024-01E

Case back of the Citizen Promaster BN1024-01E with diver helmet engraving

Top view of the Citizen Promaster BN1024-01E

Citizen Promaster BN1024-01E on the wrist

Citizen Promaster BN1024-01E among diving equipment

Citizen BN1024-01E: The 300m Diver with Helium Valve and Black Promaster Seal

Citizen Promaster Diver 300 m ISO 6425 Black

Name: Citizen Promaster Diver 300 m ISO 6425 Black
Brand: Citizen
SKU: BN1024-01E
Price: 449.1 EUR
Availability: InStock

The Citizen BN1024-01E from the Promaster collection. The brand has created this professional diving watch with ISO 6425 certification and Eco-Drive technology, heir to the legendary BN0156 but with the technical evolution that makes it a true saturation diver.

Price €449.10 €499.00 -10%

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Related Collections:

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BN1024-01E Citizen Promaster Eco-Drive Professional ISO 6425 Watch
Professional diving watch from the Promaster collection, with ISO 6425 Annex A certification for saturation diving. 46 mm stainless steel case, graduated black dial, unidirectional serrated steel bezel and 4 mm flat sapphire crystal with anti-reflective coating.
Citizen Eco-Drive E365 caliber, solar movement with 365 days of power reserve and low charge indicator, water resistance of 30 ATM (300 meters) with helium valve.

This watch was born as the spiritual successor to the legendary BN0156, but with the technical evolution that makes it a true saturation diver.
The case is round, 46 mm in diameter and 16.3 mm thick, made of stainless steel with finishes that prioritize functionality: 120-click unidirectional bezel with serrated steel insert, crown protected at 4 o'clock and screw-down case back that guarantees water resistance without the need to open the case.
With a weight of 161 grams, it offers a solid and professional presence.
It features a black graduated dial that evokes the loss of light in the ocean, with large hands and indices treated with luminescent material for perfect reading in darkness. The 4 mm flat sapphire crystal with anti-reflective coating protects the watch from bumps and scratches, even during immersion.
The strap is made of BENEBiOL (plant-based polymer), flexible, resistant to hydrolysis and includes an extension for adjustment over wetsuits. The lugless design makes it easy to adapt even to smaller wrists.
Includes Eco-Drive technology that eliminates battery changes, preserving the original water resistance without unnecessary pressure tests, and comes in its exclusive yellow cylinder-shaped box.

Buy with official warranty

This Citizen Promaster BN1024-01E is 100% original. We are an official Citizen distributor, guaranteeing you access to the brand's 3-year national warranty (2-year international) and its specialized technical service.

Technical sheet

EAN	4974374345394
Brand	Citizen
Product type:	Watch
Reference	BN1024-01E
Gender	Man
Collection	Promaster
Shape Watch	Rounded
Display	Analog
Movement	Eco-Drive
Functions:	3 Hands Day
Crown Type	Screw-on crown
Box Material	Steel
Strap Material	Resin
Crystal type	Sapphire
Dial Color	Black
Color Needles	Grey
Bracelet Color	Black
Case Diameter	46 mm
Case thickness	16,3 mm
Case included?	Yes Oficial Presentation Box
Water Resistance	30 BAR = 30 ATM = 300 Meter
Watch strap mounting type	Buckle closure
Luminescent needles	Yes, it has Luminous treatment.
Warranty	3 Year National Spain \| 1 Year International

Condition New

Faq´s

How often does this watch need a battery change?

It doesn't take a battery. It's Eco-Drive, which charges with any light source (natural or artificial). A full charge gives it 365 days of power reserve, hence the name of the E365 caliber. When the charge is low, the second hand starts moving in two-second intervals to alert you. You'll never have to open it to change batteries.

Is it too big for a wrist under 18 cm?

The case measures 46 mm, but the lugless design makes it fit better than other watches of its size. Several users mention that "it looks smaller than it actually is" and that "it wears very well" even on not particularly large wrists. The best thing is to try it on, but it's designed to be wearable thanks to the short lug-to-lug distance.

What is the helium valve for? Will I need it?

The helium valve (at 2 o'clock) allows helium gas to escape from the watch during decompression in professional saturation diving, preventing the crystal from popping off. If you don't dive in hyperbaric chambers or do long dives with gas mixtures, you won't use it. But its presence indicates the highest level of certification (ISO 6425 Annex A), guaranteeing that the watch is built for the most extreme conditions. It's a hallmark of true professionalism.

Why do enthusiasts call it the spiritual successor to the BN0156?

Because it inherits its essence of a pure diving tool, its extreme legibility, and that instrument-like character. But the BN1024-01E evolves the concept: where the BN0156 was a solid and accessible diver, this one adds 4 mm sapphire crystal, a helium valve, and ISO 6425 Annex A certification for professional saturation diving. It's the BN0156 that got serious.

Other models

If you're looking for the same professional performance but with a different dial color, don't miss the Citizen Promaster BN1024-01Z with gradient burgundy dial. You can also explore the "Ecozilla" line, such as the BJ8055-04X with green full lumen dial or the BJ8056-01E Godzilla, for those looking for a hammer instead of a Swiss army knife. Discover the entire Citizen Promaster collection in our catalog to find the instrument that best suits your dives.