SEIKO PROSPEX HBC004J1 SPEEDTIMER MECHANICAL MEN WATCH
HBC004J1
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- Backordered, shipping soon
- 15% off in cart
- Warranty 3 Years
The Seiko Prospex HBC004J1 is a three-hand mechanical watch with a blue grey dial, a rotating inner ring and a black leather strap, in a 39.5mm stainless steel case. LumiBrite is applied to the hands and hour markers, there is a date, and curved sapphire sits over the dial.
Power comes from calibre 6R55, which winds from the motion of your wrist and can be wound by hand, holding approximately 72 hours from a full wind — three days, so the watch survives a weekend off the wrist without stopping. The case is rated to 200 metres and closed by a screw case back.
At a Glance
- BrandSeiko
- CollectionProspex Speedtimer
- MovementCalibre 6R55 Automatic
- Case Size39.5mm
- DialBlue Grey
- BezelRotating Inner Ring
- Case MaterialStainless Steel
- GlassCurved Sapphire Crystal
- StrapBlack Leather
- Water Resistance200 Metres
- Power ReserveApprox. 72 Hours
- LumiBriteHands & Hour Markers
Why You'll Love It
- Approximately 72 hours from a full wind. Set it down on Friday evening and it is still running on Monday morning.
- A rotating inner ring, turned from the case rather than the outer edge, so the bezel line stays unbroken.
- LumiBrite on the hands and hour markers, charged by light and readable once the light goes.
- A 200-metre case closed by a screw case back, behind curved sapphire.
- It winds itself as you wear it, and takes a hand wind when it has been sitting.
Key Features
- Calibre 6R55 automatic movement — self-winding from the movement of the wearer, with hand winding available and a power reserve of approximately 72 hours.
- Rotating inner ring — fitted inside the crystal rather than around the outside of the case.
- LumiBrite on the hands and hour markers — charged by light, with a date on the dial.
- Curved sapphire crystal and a screw case back — in a 39.5mm stainless steel case rated to 200 metres.
- Black leather strap — with a pull-out crown on the case.
Technical Specifications
| Model Number | HBC004J1 |
|---|---|
| Case Material | Stainless Steel |
| Case Diameter | 39.5mm |
| Case Colour | Silver |
| Glass | Curved Sapphire Crystal |
| Case Back | Screw Case Back |
| Crown | Pull Out |
| Bezel | Rotating Inner Ring |
| Water Resistance | 200 Metres |
| Colour | Blue Grey |
|---|---|
| Hand Indicators | Hour, Minute, Seconds |
| Calendar | Date |
| LumiBrite | Hands & Hour Markers |
| Material | Leather |
|---|---|
| Colour | Black |
| Calibre | Seiko 6R55 |
|---|---|
| Type | Automatic — Powered By The Movement Of The Wearer |
| Function | Analogue — 3 Hands |
| Display | Analogue |
| Hand Winding | Yes |
| Power Reserve | Approx. 72 Hours |
Frequently Asked Questions
How long does it run off the wrist?
Approximately 72 hours from a full wind, which is three days. A watch taken off on Friday evening will usually still be running on Monday morning, which is the practical difference between this and a movement holding around 40 hours.
How do I wind it?
Wearing it does most of the work — calibre 6R55 winds from the motion of your wrist. It can also be wound by hand using the crown, which is the quickest way to start it from stopped. A mechanical watch that has run down does no harm by stopping; wind it, reset the time and date, and carry on.
What is the rotating inner ring for?
It is a ring inside the crystal rather than around the outside of the case, so the outer profile stays clean. Seiko publishes that the ring rotates but does not specify a scale for this reference, so check the watch itself for what is printed on it.
Is this a diver's watch?
No. The case is rated to 200 metres, but Seiko does not give this reference its Diver's designation, and the crown pulls out rather than screwing down. Treat the rating as resistance to water rather than permission to dive, keep it away from scuba use, and never operate the crown while the watch is wet.
Does the case back screw down?
Yes — the case back is a screw case back. The crown is a pull-out crown, which is a separate thing: the back threads into the case, the crown does not. That is worth knowing because an open crown is the most common way water reaches a movement.
Is the dial readable in the dark?
Yes. Seiko applies LumiBrite to the hands and hour markers for this reference. It charges from light and fades through the night rather than glowing at a constant level.
Can the strap be adjusted?
The strap is black leather. Strap adjustment is available in store — 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
- Strap Adjustment Available in store with your warranty book
Calibre Type: Automatic - Powered By The Movement Of The Wearer
Calibre Function: Analogue - 3 Hands
Power Reserve/Battery Life: Approx. 72 Hours Power Reserve
Battery: N/A
Calibre Number: 6R55
Display: Analogue
Water Resistance: 200 Metres
Case Material: Stainless steel
Case Size (Diameter): 39.5mm
Case Color: Silver
Band/Bracelet: Strap - Leather
Band Color: Black
Glass Material: Curved sapphire crystal
Crown: Pull Out
Rotating Bezel: Rotating Inner Ring
Dial Color: Blue Grey
Hand Indicators: Hour, Minute, Seconds
Calendar Indicators: Date
Lumibrite: Hands & Hour Markers
Hand Winding Capability: Yes
Screw case back: Yes
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.
