CITIZEN AT8300-58E PROMASTER ECO-DRIVE CHRONOGRAPH MEN WATCH
AT8300-58E
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- 3 Years Warranty
The Citizen Promaster Navihawk A-T is a flight-ready instrument built around radio-controlled timekeeping — the "A-T" stands for Atomic Timekeeping. The in-house Calibre H800 synchronises with atomic clock signals across four regions — Europe, Japan, the USA and China — keeping time to the second without you ever setting it.
The black dial uses clear line indices with silver-tone luminous hands for fast, high-contrast reading. An internal slide-rule scale surrounds the display, operated by a second crown for fuel consumption and tank capacity calculations. Alongside it: World Time across 26 cities, a perpetual calendar, a 24-hour display, a chronograph timing to 1/20 second across 60 minutes, and a date window at 3 o'clock.
The 41mm silver-tone stainless steel case is just 11.62mm thick, with anti-reflective sapphire glass, anti-magnetic construction and 200 metres of water resistance, on a solid triple-link bracelet with a double push clasp. A full charge runs 180 days. Citizen built this line specifically to prove a complete pilot's feature set didn't require a 43mm-plus case.
At a Glance
- BrandCitizen
- CollectionPromaster Navihawk A-T
- MovementCalibre H800 Eco-Drive
- TimekeepingRadio-Controlled, 4 Regions
- Case Size41mm
- Thickness11.62mm
- DialBlack, Line Indices
- World Time26 Cities
- Chronograph1/20 Sec, 60 Minutes
- Power Reserve180 Days
- GlassSapphire, Anti-Reflective
- Water Resistance200m
Why You'll Love It
- Radio-controlled timekeeping synchronises the watch to atomic clock signals across four regions — Europe, Japan, the USA and China — so it corrects itself wherever you land.
- World Time covering 26 cities makes switching between home and destination time immediate, which is the function frequent travellers actually use most.
- Black dial with clear line indices and silver-tone luminous hands is the most legible configuration in this family — high contrast, no clutter, fast to read.
- The internal slide-rule scale sits under the crystal and is turned by a dedicated second crown, so it stays protected while remaining fully usable.
- The chronograph resolves to 1/20 of a second across a full 60 minutes — genuinely precise timing rather than a token stopwatch.
- A full charge runs 180 days, with a battery discharge indicator on the dial so you always know where you stand.
- This is a complete pilot's watch in a 41mm case. Most watches carrying this feature set run 43mm or larger — Citizen built this line to avoid that compromise.
- Anti-magnetic construction, anti-reflective sapphire glass and 200m water resistance make it a properly engineered instrument rather than a styling exercise.
Perfect For
- Aviation & Pilot Watch Enthusiasts
- Frequent Travellers
- Atomic Timekeeping Fans
- Eco-Drive & Solar Watch Fans
- High-Legibility Dials
- Full Function, Moderate Size
- Gift for Him
Key Features
- Radio-controlled (atomic) timekeeping — synchronises across Europe, Japan, the USA and China.
- World Time, 26 cities — with a 24-hour display.
- Internal slide-rule scale — for fuel consumption and tank capacity calculations, operated by a second crown.
- Chronograph — measuring up to 60 minutes with 1/20-second accuracy.
- Perpetual calendar — with a date window at 3 o'clock.
- Citizen Eco-Drive Calibre H800 — light-powered, with a 180-day power reserve at full charge.
- Battery discharge indicator — charge level visible on the dial.
- Black dial with clear line indices — silver-tone hands with luminous treatment.
- Anti-magnetic construction.
- 41mm silver-tone stainless steel case — 11.62mm thick, with two crowns.
- Anti-reflective sapphire glass — scratch-resistant and glare-free.
- Solid triple-link stainless steel bracelet — secure double push clasp.
- 200-metre water resistance (20 BAR).
Technical Specifications
The Citizen Promaster Navihawk A-T AT8300-58E is a 41mm men's radio-controlled Eco-Drive chronograph powered by Calibre H800, synchronising with atomic clock signals across Europe, Japan, the USA and China, with a 180-day power reserve at full charge. The silver-coloured stainless steel case measures 11.62mm thick with two crowns, anti-reflective sapphire glass, anti-magnetic construction and 200 metres of water resistance. The black dial carries clear line indices and silver-tone luminous hands, World Time for 26 cities, a perpetual calendar with a date window at 3 o'clock, a 24-hour display, a chronograph measuring to 1/20 second across 60 minutes, and a battery discharge indicator. An internal slide-rule scale is operated by a second crown. It's finished on a solid stainless steel bracelet with a double push clasp.
| Model Number | AT8300-58E |
| Collection | Promaster Navihawk A-T (Promaster Sky in Europe) |
| Case Material | Stainless Steel, Silver-Tone |
| Case Diameter | 41mm |
| Case Thickness | 11.62mm |
| Crowns | Two — Main, and Second for Slide Rule |
| Bezel / Scale | Internal Slide Rule |
| Glass | Sapphire, Anti-Reflective |
| Magnetic Resistance | Anti-Magnetic |
| Water Resistance | 200 Metres (20 BAR) |
| Colour | Black |
| Indices | Clear Line Indices, Luminous |
| Hands | Silver-Tone, Luminous |
| Timekeeping | Radio-Controlled — Europe, Japan, USA, China |
| World Time | 26 Cities |
| Chronograph | 1/20 Second, up to 60 Minutes |
| Calendar | Perpetual — Date at 3 O'Clock |
| Indicators | 24-Hour Display, Battery Discharge |
| Material | Solid Stainless Steel, Triple-Link, Silver-Tone |
| Clasp | Double Push Clasp |
| Calibre | Citizen H800 |
| Type | Eco-Drive, Radio-Controlled |
| Power Reserve | 180 Days at Full Charge |
Best Matched With
- Flight Jacket
- Charcoal Suit
- Technical Outerwear
- Dark Denim
- Travel Essentials
- Smart-Casual Weekend
Frequently Asked Questions
What does "A-T" mean?
A-T stands for Atomic Timekeeping. The watch receives time signals broadcast from atomic clocks and corrects itself automatically, keeping accuracy to the second without you ever setting it. This model syncs across four regions — Europe, Japan, the USA and China.
What happens outside a radio signal area?
It keeps time on its own as a highly accurate quartz watch until the next signal is received, then re-syncs automatically. You don't need to do anything.
How does the internal slide rule work?
The slide-rule scale sits inside the crystal rather than on an external bezel, and you turn it using a second crown on the side of the case. It's used for aviation calculations such as fuel consumption and tank capacity. Keeping it internal protects the scale and keeps the case profile clean.
How does this compare to the blue and green versions?
Same Calibre H800, same 41mm case, same functions across all three. This black-dial version with silver-tone steel is the most legible and the most versatile day to day. The AT8300-58L uses a deep blue dial in the same silver case, while the AT8304-57W pairs a green dial with a black-coated case for a darker look.
Why is the 41mm case notable?
Pilot's watches carry a lot of functions, so they usually end up at 43mm or larger. Citizen designed this line specifically to fit a full feature set — world time, chronograph, radio control and a slide rule — into a 41mm case, for people who want the capability without the size.
What is a perpetual calendar?
A perpetual calendar automatically accounts for months of different lengths and leap years, so the date display stays correct without you ever manually adjusting it at month-end.
How long does the charge last?
180 days — roughly six months — from a full charge with no further light exposure. A battery discharge indicator on the dial tells you when the reserve is running down, and any light source recharges it.
Is this a dive watch?
No — it's a pilot's watch from Citizen's Promaster aviation line, built around the slide rule, world time and radio-controlled timekeeping. The 200-metre water resistance means it handles swimming and snorkelling comfortably, but the watch is designed and equipped for flying rather than diving.
Will 41mm fit my wrist?
41mm sits comfortably in the modern men's range and suits most wrist sizes well — that's precisely the point of this model. At 11.62mm thick it's genuinely slim for a watch carrying this many functions.
Is the bracelet adjustable?
Yes. The bracelet can be resized by adding or removing links. City Chain offers complimentary bracelet sizing at any outlet — bring your warranty book along for the service.
What warranty does this watch come with?
The AT8300-58E comes with a 3-year warranty when purchased from City Chain Singapore, an authorised Citizen retailer. Keep your warranty card and proof of purchase — both are required when submitting the watch for service at any City Chain outlet.
Why Buy from City Chain Singapore
- Authorised Retailer 100% genuine Citizen product
- 3-Year Warranty Covered on every purchase
- Free Shipping All orders within Singapore
- Bracelet Adjustment Size it in-store
Gift With Purchase
Free Promaster Travel Watch Pouch with every Citizen watch purchase. While stocks last.
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Caliber: H800
Movement: Eco-Drive
Strap: Stainless Steel
Water Resistant: 200m
Thickness: 11.6mm
Case Size: 41mm
Case: Stainless Steel
Glass: Sapphire Glass
Maximum run time from full charge (Normal Use Condition): Approximately 6 months
Specification
24hrs, Date and Day Display
26 World Cities Time
Chronograph
Eco-Drive
Global Radio-Controlled
Insufficient Charge Warning Function
Luminous Hands and Index
Overcharge Prevention Function
Perpetual Calendar
Power Saving Function
Summer Time ON / OFF
Delivery within Singapore | Order by 11AM
(Checkout options may vary depending on minimum order requirements)
• Free Standard Delivery (3 business days)
• Free Next Day Delivery
• Express Delivery at $30 (order by 2PM)
• Click & Collect (ready in 2–3 business days)
Weekend & Public Holiday Orders
Orders placed during this time will be processed on the next business day.
For online purchase, you can have bracelet or leather strap adjustments done at any City Chain store. Please bring along your warranty book for the service.
