SEIKO PROSPEX HBJ003P1 SOLAR SPEEDTIMER CHRONOGRAPH MEN WATCH
HBJ003P1
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- Warranty 3 Years
The Seiko Prospex HBJ003P1 is a Solar Speedtimer chronograph with a racing green dial behind curved sapphire, in a 41.4mm stainless steel case. Speedtimer is Seiko's motorsport timing line, and the two features that define it are both here: a stopwatch reading to 1/5 of a second with split-time capability, and a tachymeter for converting elapsed time into speed.
It runs on calibre V192, which takes its power from any light source rather than a battery you replace — approximately six months of running from a full charge, with a power reserve indicator on the dial so you can see where it stands. LumiBrite sits on the hands and hour markers, there is a date and a 24-hour indicator, and the bracelet is stainless steel.
At a Glance
- BrandSeiko
- CollectionProspex Speedtimer
- MovementCalibre V192 Solar
- Case Size41.4mm
- DialRacing Green
- Case MaterialStainless Steel
- GlassCurved Sapphire Crystal
- FunctionsChronograph + Tachymeter
- Water Resistance100 Metres
- BraceletStainless Steel
- Power ReserveApprox. 6 Months
- LumiBriteHands & Hour Markers
Why You'll Love It
- A stopwatch that reads to 1/5 of a second over 60 minutes, with split-time capability for taking an intermediate reading without stopping the count.
- The tachymeter turns an elapsed time into a speed, which is what the Speedtimer line was built around.
- Light is the only thing it needs. Calibre V192 charges from any light source and runs approximately six months from full, with a power reserve indicator on the dial rather than guesswork.
- Racing green under curved sapphire — the curve follows the dial rather than sitting flat across it.
- LumiBrite on the hands and hour markers, so the time stays readable once the light goes.
Key Features
- Calibre V192 solar chronograph — powered by any light source, running approximately six months from a full charge. Seiko Boutique Singapore states accuracy as ±15 seconds a month across a normal temperature range of 5°C to 60°C.
- Stopwatch to 60 minutes in 1/5-second increments — with split-time capability, so an intermediate reading can be taken while the count continues.
- Tachymeter scale — for reading speed from an elapsed time over a known distance.
- Curved sapphire crystal — over a racing green dial, with LumiBrite on the hands and hour markers.
- Power reserve indicator, date and 24-hour indication — alongside the hour, minute and seconds hands.
Technical Specifications
| Model Number | HBJ003P1 |
|---|---|
| Case Material | Stainless Steel |
| Case Diameter | 41.4mm |
| Case Colour | Silver |
| Glass | Curved Sapphire Crystal |
| Crown | Pull Out |
| Rotating Bezel | N/A |
| Water Resistance | 100 Metres |
| Colour | Racing Green |
|---|---|
| LumiBrite | Hands & Hour Markers |
| Hand Indicators | Hour, Minute, Seconds, 24-Hour |
| Calendar | Date |
| Tachymeter | Yes |
| Power Reserve Indicator | Yes |
| Material | Stainless Steel |
|---|---|
| Colour | Silver |
| Calibre | Seiko V192 |
|---|---|
| Type | Solar — Powered By Any Light Source |
| Function | Chronograph |
| Display | Analogue |
| Accuracy | ±15 seconds a month at normal temperature range (5°C and 60°C) |
| Power Reserve | Operating for approx. 6 months (when fully charged) |
| Stopwatch | 60 Minutes in 1/5-Second Increments, Split Time Capability |
Frequently Asked Questions
What is a tachymeter and how do I use it?
It converts an elapsed time into a speed. Start the chronograph as you pass a known distance marker, stop it at the next one a measured distance away, and read the figure the chronograph hand points to on the tachymeter scale. Over one kilometre or one mile, that figure is your average speed in kilometres or miles per hour.
Do I ever need to change the battery?
No. Calibre V192 is solar and charges from any light source into a rechargeable cell, holding approximately six months of running when fully charged. The power reserve indicator on the dial shows how much charge is left, so you can see when it needs light rather than finding out when it stops.
What does split time mean on the stopwatch?
It lets you read an intermediate time without ending the measurement. The hand stops so you can take the reading, then catches back up to where the count has reached, so a single run can be timed in sections.
How accurate is it?
Seiko Boutique Singapore states ±15 seconds a month across a normal temperature range of 5°C to 60°C. That is a quartz specification, so it holds whether or not the watch is being worn, unlike a mechanical movement.
Can I swim with it?
It is rated to 100 metres, which covers swimming and water sports. It is not a diver's watch — it has a pull-out crown rather than a screw-down one, and Seiko does not rate it for diving with an air cylinder. The 100-metre figure is a pressure rating, not an instruction to take the watch to that depth, and the crown and chronograph pushers should never be operated while the watch is wet.
Does it have a rotating bezel?
No. Seiko lists the rotating bezel as not applicable for this reference. Elapsed time is measured on the chronograph rather than by turning the bezel.
Is the bracelet adjustable?
Yes. Links can be added or removed to size the stainless steel bracelet to your wrist. 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
Extra $20 OFF with min. $250 spend
Use Code: CC20
Extra $30 OFF with min. $300 spend
Use Code: CC30
Extra $40 OFF with min. $500 spend
Use Code: CC40
Calibre Type: Solar - Powered By Any Light Source
Calibre Function: Chronograph
Accuracy: +/-15 seconds a month at normal temperature range (5°C and 60°C)
Power Reserve/Battery Life: Operating for approx. 6 months (when fully charged)
Calibre Number: V192
Display: Analogue
Water Resistance: 100 Metres
Case Material: Stainless steel
Case Size (Diameter): 41.4mm
Case Color: Silver
Band/Bracelet: Bracelet - Stainless Steel
Band Color: Silver
Glass Material: Curved sapphire crystal
Crown: Pull Out
Rotating Bezel: N/A
Dial Color: Racing Green
Hand Indicators: Hour, Minute, Seconds, 24-Hour
Calendar Indicators: Date
Lumibrite: Hands & Hour Markers
Power Reserve Indicator: Yes
Stopwatch: Stopwatch Measures 60 Minutes In 1/5th Of A Second Increments With Split Time Capability
Tachymetre: 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.
