Men's Citizen Eco-Drive Promaster Altichron Black Polyurethane Strap and Black Dial Watch BN5058-07E

Items Description

The Citizen Eco-Drive Promaster Altichron BN5058-07E is an analog sports watch designed for outdoor adventurers, hikers, and pilots who require reliable altitude data and navigational tools in a single instrument. This model combines a black dial with red accents, a two-tone stainless steel case, and a black polyurethane strap, creating a purposeful look that prioritises function without sacrificing wrist presence. At 47 mm in diameter, the case is substantial, and the dial layout delivers a dense array of aviator-style information that rewards careful reading.

 

The Altichron takes its name from its central feature: an altimeter that measures altitude from 1,000 ft below sea level to 32,000 ft above it. Powered by Citizen's Eco-Drive light-powered movement, the watch runs on any visible light source and eliminates the need for battery replacement, making it a dependable choice for extended trips away from power outlets. The black polyurethane strap is flexible and weather-resistant, while the screw-down crown and 200-metre water resistance rating support use in rain, river crossings, and other demanding fieldwork.

 

Key Advantages of the Men's Citizen Eco-Drive Promaster Altichron Black Polyurethane Strap and Black Dial Watch BN5058-07E

 

1. Altimeter Function for High-Altitude Navigation

The defining feature of the Promaster Altichron is its built-in altimeter, an analogue instrument that reads altitude across a range of 1,000 ft to 32,000 ft. This allows hikers and climbers to monitor elevation changes directly from the dial, without needing to stop and check a phone or GPS unit. The altimeter scale is printed along the outer dial ring, with a dedicated pointer hand that indicates the current altitude reading.

 

• Measurement Range: Altitude readings from -1,000 ft to +32,000 ft cover most terrestrial and high-altitude trekking routes.
• Analogue Readout: The pointer-based display presents altitude data in a format that remains visible even in cold weather conditions where touchscreens may become unresponsive.
• Field Utility: The altimeter pairs naturally with the watch's compass function, giving users both direction and elevation in one glance.
• No Battery Dependency: Because the movement is solar-powered, the altimeter remains operational as long as the watch has been exposed to light.

 

2. Eco-Drive Solar Power System

Citizen's Eco-Drive technology converts light into electrical energy, storing it in a rechargeable cell that powers the watch continuously. This system removes the need for periodic battery changes and makes the Altichron well-suited for users who spend long stretches in remote environments. According to Citizen, a fully charged watch can run for months in darkness, and a brief exposure to light tops up the charge during daily wear.

 

• Light Charging: The dial absorbs light through a specially designed solar panel beneath the dial surface.
• Extended Reserve: When fully charged, the watch retains power for an extended period of non-use, supporting multi-day expeditions.
• Convenience: Users can recharge the watch simply by leaving it on a windowsill or near a desk lamp, eliminating the need for specialised charging equipment.

 

3. Robust Case and 200-Metre Water Resistance

The 47 mm case is constructed from two-tone stainless steel, pairing brushed and polished finishes to give the Altichron a technical yet refined appearance. A screw-down crown helps protect the internal movement from water ingress, while the 200-metre water resistance rating (20 bar) allows for swimming and snorkelling, though it is not rated for scuba diving. The black polyurethane strap offers a secure grip on the wrist, even when wet, and resists damage from UV exposure and temperature swings.

 

• Case Diameter: 47 mm width provides a bold, legible dial presence suited to larger wrists and outdoor gear.
• Lug Width: 21.65 mm lug spacing allows for strap replacement if users prefer a NATO or metal bracelet option.
• Water Rating: WR200 / 20 bar / 666 ft ensures confidence during heavy rain, swimming, and recreational water sports.
• Crown Protection: The screw-down crown adds a layer of security against accidental knocks and water pressure.

 

4. Multi-Function Dial with Compass and Power Reserve Indicator

Beyond the altimeter, the dial integrates several practical complications that extend the watch's usefulness in the field. A compass bezel allows for basic orienteering when paired with the sun or a known reference point, while a power reserve indicator on the dial tells the wearer how much charge remains in the Eco-Drive cell. Luminous hands and markers ensure that altitude and time data remain legible after dark, a critical feature for early-morning starts or late-evening descents.

 

• Compass Bezel: Rotating inner bezel supports basic direction finding without requiring external instruments.
• Power Reserve Indicator: A dedicated subdial displays the current charge level, helping users manage light exposure during long trips.
• Lume: Luminous paint on hands and hour markers provides visibility in low-light conditions such as dawn, dusk, and forest shade.
• Red Accents: Red highlighting on the altimeter scale and second hand adds contrast, making critical scales easier to distinguish at a glance.

 

5. Versatile Styling for Adventure and Everyday Wear

While the Altichron is engineered for outdoor performance, its two-tone stainless steel case and black dial allow it to transition into casual and office settings without looking out of place. The black polyurethane strap is subdued enough for daily wear, yet the 47 mm diameter and multi-layer dial give the watch a distinctive character that stands apart from conventional field watches. The combination of technical complexity and neutral colouring means it pairs well with hiking gear, denim, or a weekend flannel shirt.

 

• Dial Aesthetics: The black base with red and white markings creates a high-contrast layout that is both functional and visually striking.
• Strap Comfort: Polyurethane is lightweight, flexible, and resistant to moisture, making it comfortable for all-day wear in varying temperatures.
• Case Finish: The two-tone treatment adds visual interest while retaining a tool-watch character that suits outdoor contexts.

 

The Citizen Eco-Drive Promaster Altichron BN5058-07E is best suited for hikers, mountaineers, and aviation enthusiasts who want an analogue instrument that provides altitude, direction, and reliable timekeeping in one package. For anyone who spends time above the tree line or in remote terrain, this watch offers the core tools needed to monitor elevation and navigate without relying on battery-dependent devices.

Specifications of Men's Citizen Eco-Drive Promaster Altichron Black Polyurethane Strap and Black Dial Watch BN5058-07E

Brand Name	Citizen
Model number	BN5058-07E
Part Number	BN5058-07E
Item Shape	Round
Dial window material type	Anti-Reflective Mineral Crystal
Clasp	Tang Buckle
Case material	Stainless Steel
Case diameter	46 millimeters
Case Thickness	14.50
Band Material	Rubber
Band width	22 millimeters
Band Color	Black
Dial color	Black
Bezel material	Bi-directional Rotating
Calendar	Date
Movement	Eco-Drive J290
Water resistant depth	200 Meters
Display Type	Analog
Metal stamp	no-metal-stamp

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Specifications
[Brand Name ]	Citizen
[Model number ]	BN5058-07E
[Part Number ]	BN5058-07E
[Item Shape ]	Round
[ Dial window material type ]	Anti-Reflective Mineral Crystal
[Clasp ]	Tang Buckle
[Case material ]	Stainless Steel
[Case diameter ]	46 millimeters
[Case Thickness ]	14.50
[Band Material ]	Rubber
[Band width ]	22 millimeters
[Band Color ]	Black
[Dial color ]	Black
[Bezel material ]	Bi-directional Rotating
[ Calendar ]	Date
[ Movement ]	Eco-Drive J290
[ Water resistant depth ]	200 Meters
[Display Type ]	Analog
[Metal stamp ]	no-metal-stamp

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