SEIKO PROSPEX HBB004K1 2026 ASIA-PACIFIC LIMITED EDITION MEN WATCH
HBB004K1
- Low stock - 4 items left
- Backordered, shipping soon
- 15% off in cart
- Warranty 3 Years
The Seiko Prospex HBB004K1 is an Asia-Pacific exclusive limited to 2,500 pieces and supplied in a special box. The orange dial sits behind Hardlex in a 41.7mm stainless steel case, 12.3mm thick, on a steel bracelet.
Seiko rates it at Diver's 200 metres — the designation it reserves for watches built and tested for diving rather than simply resistant to water — with a screw-down crown, a one-way rotating bezel and LumiBrite on the hands and hour markers. Calibre 4R35 runs it automatically from the motion of your wrist, with hand winding available and a date on the dial.
At a Glance
- BrandSeiko
- CollectionProspex Diver's
- EditionLimited to 2,500 Pieces
- MovementCalibre 4R35 Automatic
- Case Size41.7mm
- Case Thickness12.3mm
- DialOrange
- GlassHardlex
- BezelOne-Way Rotating
- Water ResistanceDiver's 200 Metres
- BraceletStainless Steel
- Power ReserveApprox. 41 Hours
Why You'll Love It
- One of 2,500 pieces made for the Asia-Pacific region, supplied in a special box.
- A genuine Diver's 200-metre rating rather than a splash rating — with the screw-down crown, one-way bezel and LumiBrite that designation calls for.
- An orange dial, which is the most legible colour Seiko puts on a diver and the reason this edition reads the way it does underwater.
- LumiBrite on the hands and hour markers, charged by light and readable once the light goes.
- 41.7mm across and 12.3mm thick, with a date on the dial and hand winding available.
Key Features
- Asia-Pacific limited edition of 2,500 pieces — supplied with a special box.
- Diver's 200 metres — Seiko's designation for a watch built and tested for diving, supported by a screw-down crown and a one-way rotating bezel.
- Calibre 4R35 automatic movement — self-winding with hand winding available, 23 jewels, 21,600 vibrations per hour and a power reserve of approximately 41 hours. Seiko states its accuracy as +45 to −35 seconds per day, and only when the watch is worn on the wrist at temperatures between 5°C and 35°C.
- One-way rotating bezel — which turns in a single direction only, so a knock can shorten an elapsed-time reading but never extend it.
- Orange dial with LumiBrite on the hands and hour markers — behind a Hardlex crystal, with a date display.
Technical Specifications
| Model Number | HBB004K1 |
|---|---|
| Edition | Asia-Pacific Limited Edition, 2,500 Pieces |
| Case Material | Stainless Steel |
| Case Diameter | 41.7mm |
| Case Thickness | 12.3mm |
| Case Colour | Silver |
| Glass | Hardlex |
| Crown | Screw Down |
| Bezel | One-Way Rotating |
| Water Resistance | Diver's 200 Metres |
| Colour | Orange |
|---|---|
| LumiBrite | Hands & Hour Markers |
| Hand Indicators | Hour, Minute, Seconds |
| Calendar | Date |
| Material | Stainless Steel |
|---|---|
| Colour | Silver |
| Calibre | Seiko 4R35 |
|---|---|
| Type | Automatic — Powered By The Movement Of The Wearer |
| Function | Analogue — 3 Hands |
| Jewels | 23 |
| Frequency | 21,600 vibrations per hour |
| Accuracy | +45 to −35 seconds per day (worn on the wrist, 5°C–35°C) |
| Hand Winding | Yes |
| Power Reserve | Approx. 41 Hours |
| Box | Special Box |
|---|
Frequently Asked Questions
How limited is this edition?
It is limited to 2,500 pieces as an Asia-Pacific exclusive, supplied with a special box. Singapore receives a share of the regional allocation rather than the whole run, and Seiko does not produce more once it is through.
Can I dive with it?
Yes, within the Diver's 200-metre rating. That is Seiko's designation for a watch built and tested for diving rather than one that simply resists water, and it covers swimming, snorkelling and diving with an air cylinder. Make sure the crown is screwed fully home before entering the water, rinse the watch in fresh water afterwards, and have the case seals checked at service intervals — the gaskets are what hold the rating over time.
When should I not change the date?
Avoid setting it between 9:00 pm and 1:00 am. Seiko's calibre 4R35 manual states that setting the date during these hours may damage the movement. If you need to change it inside that window, wind the hands past 1:00 am first, set the date, then bring the time back.
What is the one-way bezel for?
Timing an interval. Line the bezel's zero marker up with the minute hand when you start and the elapsed minutes read straight off the bezel. It turns in one direction only, so a knock can only make the elapsed time look longer than it is, never shorter — the safety principle behind every diver's bezel.
What does the screw-down crown do?
It threads into the case rather than simply pushing in, sealing the opening the crown passes through. Make sure it is screwed fully home before the watch goes near water: an unscrewed crown is the most common way water reaches a movement.
What happens if I do not wear it for a couple of days?
It stops. The power reserve is approximately 41 hours from a full wind, so a watch set down on Friday evening will usually have stopped by Sunday. Wind it by hand, reset the time and date, and carry on. That is normal for a mechanical watch and does it no harm.
Is the bracelet adjustable?
Yes. Links can be added or removed to size the stainless steel bracelet. City Chain offers complimentary bracelet sizing at any outlet — bring your warranty book along for the service.
Why Buy from City Chain Singapore
- Authorised Retailer 100% genuine Seiko product
- 3-Year Warranty Covered on every purchase
- Free Shipping All orders within Singapore
- Bracelet Adjustment Complimentary sizing in store
Caliber Number: 4R35
Movement Type: Automatic with manual winding
Power reserve: Approx. 41 hours
Jewels: 23
Stop second hand function
Date display
Case Material: Stainless steel
Case Thickness: 12.3mm
Case Diameter: 41.7mm
Lug-to-lug: 49.5mm
Crystal: Hardlex
LumiBrite on hands, index(es) and bezel
Three-fold clasp with secure lock , push button release with extender
Distance between lugs: 20mm
Water Resistance: 200m / 660ft diver's
Magnetic Resistance: 4,800 A/m
Weight: 170.0g
LIMITED EDITION on the case back
Serial number engraved on the case back
Unidirectional rotating bezel
Screw-down crown
Screw case back
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.
