Citizen Promaster Sky AT8391-52H Men's • Radio-Controlled Solar Watch • Sapphire Crystal
Citizen Promaster Sky AT8391-52H Men's • Radio-Controlled Solar Watch • Sapphire Crystal
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Model Number: AT8391-52H
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Product Details
Description
The Citizen Promaster Sky AT8391-52H is a men's wristwatch from the Promaster Sky line, engineered for the highest demands in precision and reliability. The five-layer dial, inspired by cockpit instruments and head-up displays, gives the watch a sculptural depth, while yellow and red accent colours ensure excellent legibility. The lightweight titanium case with Duratect surface hardening weighs around 60% less than stainless steel while remaining extraordinarily scratch-resistant.
The Eco-Drive calibre H804 is charged by light, receives radio signals for automatic time correction, and offers a full chronograph with tachymeter scale. With a diameter of 40.5 mm and a case thickness of 10.4 mm, the watch sits comfortably on the wrist. The anti-reflective sapphire crystal and water resistance to 10 bar make the Promaster Sky AT8391-52H the ideal companion for sport and travel.
Key Features of the Citizen AT8391-52H
- Eco-Drive Radio-Controlled: Calibre H804, solar-charged with automatic radio time synchronisation for permanently accurate timekeeping.
- Super Titanium Construction: Case and bracelet crafted from Duratect-treated titanium — lightweight, durable and skin-friendly.
- Chronograph with Tachymeter and Sapphire Crystal: Stopwatch function, date display and anti-reflective sapphire crystal for professional use.
Technical Data
Basic data
| Target group |
Men |
|---|---|
| Manufacturer | Citizen |
| Model series / Collection |
Promaster Sky |
| Model number |
AT8391-52H |
| EAN / GTIN | 4974374354402 |
| Display type |
Analog |
| Water resistance in bar |
10 |
| Colour |
Silver |
| Other features |
Radio-controlled time reception, tachymeter, 24-hour display, Eco-Drive Solar |
Case & Construction
| Case material |
Titanium |
|---|---|
| Case colour |
Silver |
| Case diameter in mm |
4,05 |
| Case shape |
Round |
| Case height in mm |
1,04 |
| Weight in grams |
89 |
| Bezel material |
Tachymeter |
| Watch glass |
Sapphire crystal |
| Crown |
Screw-down crown |
Dial & Display
| Dial colour |
White |
|---|---|
| Second hand |
Yes |
| Luminous material (Lume) |
Yes (hands & indices) |
Movement & Drive
| Drive type / Movement |
Radio-controlled |
|---|---|
| Calibre / Movement |
H804 |
| Date display |
Yes |
| Stopwatch function |
Yes |
Strap & Clasp
| Strap material |
Titanium |
|---|---|
| Strap colour |
Silver |
Care instructions
Care Instructions for Wristwatches
Care & Cleaning
- Daily: Wipe case and bracelet with a soft, dry cloth to remove dirt and perspiration.
- Water-resistant watches: Clean with mild soapy water and a soft brush, rinse, dry thoroughly.
Important: Screw the crown down firmly beforehand!!! - Not water-resistant: Clean only dry or slightly damp, do not use water or cleaning agents.
- Avoid: Aggressive agents, perfume, cosmetics and heat.
- Leather straps: Do not soak, clean only slightly damp and allow to dry away from heat.
- Water resistance: Do not wear in the shower or bath, have tested annually.
- Battery (quartz): Have a depleted battery replaced immediately.
- Mechanical watches: Service by a master watchmaker every 5 years.
Storage & Handling
- Store the watch separately, not in direct contact with other jewellery (risk of scratching).
- Place mechanical watches on a flat surface when winding, do not leave the crown pulled out.
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Product questions
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CITIZEN – Watches for everyone, since 1918
When the first Citizen watch appeared in 1924, it was a small revolution: precise timekeeping for everyone – not just for a privileged few. The name said it all: Citizen, for the people.
Today, Citizen stands for innovative wristwatches with technologies like Eco-Drive, which charge using light. The philosophy remains: 'Better Starts Now' – now is the right moment to make things better.
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Whether for yourself or as a gift: We guarantee 100% genuine products from renowned manufacturers. Your order will leave our premises insured and will reach you the very next business day.
Should the piece not fit perfectly, take advantage of our generous 100-day return policy – uncomplicated and free of charge. Experience for yourself why over 13,000 customers have found their timepieces with us.
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