SEIKO PROSPEX HBC006J1 ALPINIST "EDO PURPLE" 145TH ANNIVERSARY LIMITED EDITION MEN WATCH
HBC006J1
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- Warranty 3 Years
Seiko's first sports watch was a mountaineering watch. The Laurel Alpinist was born in 1959, built to withstand the demands of climbing and the outdoors, and made for mountain climbers and field sports enthusiasts at a time when Japanese watchmaking had not yet turned to sport. The Seiko Prospex HBC006J1 carries that line into the company's 145th anniversary.
The anniversary colour is Edo purple, marking the traditions carried from ancient Edo through to modern-day Tokyo. Around the dial runs the Alpinist's rotating compass inner ring, and the case — 39.5mm of stainless steel with a super hard coating — has a screw-down crown and is rated to 200 metres. Inside, Calibre 6R55 holds 72 hours of running time, three full days. The case back is see-through and engraved LIMITED EDITION on a run of 7,000 pieces.
At a Glance
- BrandSeiko
- CollectionProspex Alpinist
- Edition145th Anniversary, 7,000 Pieces
- MovementCalibre 6R55 Automatic
- Case Size39.5mm
- Case Thickness12.7mm
- DialEdo Purple
- Inner RingRotating Compass
- GlassSapphire, AR Coated
- Power ReserveApprox. 72 Hours
- Water Resistance200m (20 BAR)
- StrapCow Leather, 20mm
Why You'll Love It
- The Alpinist is where Seiko's sports watches begin. The 1959 Laurel Alpinist was the company's first, and this reference marks 145 years by returning to it.
- Three days of running time. The 72-hour power reserve means a watch taken off on Friday evening is still running on Monday morning — no resetting after a weekend off the wrist.
- The rotating compass inner ring is the Alpinist's signature, and it is a working instrument rather than decoration.
- A super hard coating on the case, which is Seiko's surface treatment for watches expected to be worn outdoors rather than kept for occasions.
- 200 metres of water resistance behind a screw-down crown. That is a serious rating for a watch that looks this restrained.
- 39.5mm across and 12.7mm thick. Compact by modern sports-watch standards, and closer to the proportions the Alpinist has always worn.
- Edo purple on a field watch. It is an unexpected colour on this design, and the reason this is a 7,000-piece edition rather than a catalogue model.
- LumiBrite on the hands and indexes, charged by light and readable in the dark without a battery drain.
- Sapphire with anti-reflective coating on the inner surface — glare control without a coating exposed to scratching on the outside.
- A see-through case back engraved LIMITED EDITION, leaving the movement visible.
Perfect For
- Hiking & The Outdoors
- Everyday Wear
- Field & Adventure Watches
- Limited Edition Collectors
- Mechanical Watch Collectors
- Seiko Collectors
- Smaller Wrists
- Milestone Gift
Key Features
- Seiko 145th Anniversary Limited Edition — limited to 7,000 pieces, with LIMITED EDITION engraved on the case back.
- Calibre 6R55 automatic movement — self-winding with manual winding available, 24 jewels, a power reserve of approximately 72 hours and an accuracy of +25 to -15 seconds per day.
- Rotating compass inner ring — the Alpinist's defining feature, for orienting yourself in the field.
- Edo purple dial — the colour of Series 3 of the anniversary collection, with LumiBrite on the hands and indexes.
- Stainless steel case with super hard coating — 39.5mm across, 12.7mm thick and 46.4mm lug-to-lug.
- Screw-down crown and 200-metre water resistance.
- Sapphire crystal with anti-reflective coating on the inner surface.
- See-through and screw case back — a display window onto the movement, carrying the limited edition engraving.
- Cow leather strap on a 20mm lug width, with a three-fold clasp and push button release.
- Stop second hand function and magnetic resistance of 4,800 A/m.
Technical Specifications
The Seiko Prospex HBC006J1 is a 39.5mm automatic watch from the Prospex Alpinist line, released as a Seiko 145th Anniversary Limited Edition of 7,000 pieces. It is powered by Calibre 6R55 with 24 jewels, a power reserve of approximately 72 hours and an accuracy of +25 to -15 seconds per day. The stainless steel case carries a super hard coating, measures 12.7mm thick and 46.4mm lug-to-lug, and has a rotating compass inner ring, a screw-down crown and a sapphire crystal with anti-reflective coating on the inner surface over an Edo purple dial with LumiBrite on the hands and indexes. It has a see-through and screw case back engraved LIMITED EDITION, a cow leather strap on a 20mm lug width with a three-fold clasp and push button release, magnetic resistance of 4,800 A/m, and 200-metre water resistance.
| Model Number | HBC006J1 |
| Case Material | Stainless Steel with Super Hard Coating |
| Case Diameter | 39.5mm |
| Case Thickness | 12.7mm |
| Lug-to-Lug | 46.4mm |
| Inner Ring | Rotating Compass |
| Crown | Screw-Down |
| Glass | Sapphire, Anti-Reflective Inner Coating |
| Caseback | See-Through, Screw Case Back, Limited Edition Engraving |
| Water Resistance | 200 Metres (20 BAR) |
| Magnetic Resistance | 4,800 A/m |
| Colour | Edo Purple |
| LumiBrite | Hands & Indexes |
| Hand Indicators | Hour, Minute, Seconds |
| Material | Cow Leather |
| Lug Width | 20mm |
| Clasp | Three-Fold with Push Button Release |
| Calibre | Seiko 6R55 |
| Type | Automatic with Manual Winding |
| Jewels | 24 |
| Display | Analogue |
| Functions | Stop Second Hand |
| Accuracy | +25 to -15 seconds per day |
| Power Reserve | Approx. 72 Hours (3 Days) |
| Hand Winding | Yes |
| Limited Edition | 7,000 Pieces |
| Anniversary Series | Seiko 145th Anniversary, Series 3 |
| Case Back Marking | Limited Edition Engraving |
Best Matched With
- Waxed Cotton Jacket
- Olive Field Shirt
- Cream Knitwear
- Brown Leather Belt
- Stone Chinos
- Dark Denim
- Suede Boots
Frequently Asked Questions
What is the Alpinist?
Seiko's original outdoor watch, and its first sports watch of any kind. The Laurel Alpinist was born in 1959, built to withstand the demands of mountaineering, and introduced to meet the needs of mountain climbers and recreational field sports enthusiasts. Seiko describes the modern line as combining toughness and practicality with a design at home both in nature and the city.
What is the compass inner ring for?
Orienting yourself outdoors. The ring rotates inside the crystal and is used together with the sun and the hour hand to work out roughly which way you are facing — the reason a mountaineering watch carries one. It is a field tool rather than a substitute for a proper compass. The instruction manual supplied with the watch sets out how to use it.
What is the Seiko 145th anniversary, and why purple?
Seiko was founded in 1881, which makes 2026 its 145th year. The anniversary collection is split into three series, each with its own theme — gold accents, Seiko Blue, and Edo purple. This watch belongs to the third, and Seiko describes Edo-murasaki as reflecting the traditions passed on from ancient Edo to modern-day Tokyo and the spirit of creativity.
What does a 72-hour power reserve mean in practice?
Three full days of running from a full wind. Take the watch off on Friday evening and it will still be running on Monday morning, which is the practical difference between this and a movement with a 41-hour reserve. It also means a watch in rotation with others stays useful for longer between wears.
How does the automatic movement work?
A weighted rotor inside Calibre 6R55 turns as your wrist moves, winding the mainspring. Wearing it through a normal day keeps it running. You can also wind it by hand using the crown, which is the quickest way to start it from cold.
How accurate is it?
Seiko states +25 to -15 seconds per day for Calibre 6R55. The stop second hand function halts the seconds hand when the crown is pulled out, so the watch can be set precisely against a time reference rather than approximately.
Can I swim with it?
The case is rated to 200 metres, which is well beyond what swimming asks of it, and the crown screws down. The practical limit here is the leather strap rather than the watch — leather does not tolerate repeated soaking, so this is not the watch to swim in regularly while it is on its original strap. Seiko gives no diver's designation, so it should not be used for scuba diving either.
What does the screw-down crown do?
It threads into the case rather than simply pushing in, which seals 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 reason a water-resistant watch lets water in.
How does 39.5mm wear?
Compactly. At 39.5mm across and 12.7mm thick this sits at the smaller end of the current sports watch range, and the 46.4mm lug-to-lug keeps it within the width of most wrists. It suits smaller wrists well and reads as a field watch rather than a large sports model. Any City Chain outlet can put it on your wrist.
How do I look after the leather strap?
Keep it dry. Moisture is what shortens a leather strap's life — sweat, rain and humidity all break the fibres down over time. Wipe it after a humid day, let it dry away from direct heat, and avoid fastening it so tightly that it creases in the same place every day.
What can I see through the case back?
The movement itself — the balance wheel oscillating, the rotor turning as you move, the gear train running. On this reference the case back also carries the LIMITED EDITION engraving that marks it as part of the anniversary run.
Does a mechanical watch need servicing?
Yes, eventually. A mechanical movement runs on lubricated moving parts that wear over years of use, so a service every few years keeps it running to specification, and is also when the case gaskets that hold the water resistance are replaced. City Chain can arrange servicing through Seiko's authorised service network — bring your warranty book.
What warranty does this watch come with?
The HBC006J1 comes with a 3-year warranty when purchased from City Chain Singapore, an authorised Seiko retailer. Keep your warranty card and proof of purchase — both are required when submitting the watch for 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
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Caliber Number: 6R55
Movement Type: Automatic with manual winding
Precision: +25 to -15 seconds per day
Power reserve: Approx. 72 hours(3 days)
Jewels: 24
Stop second hand function
Case Material: Stainless steel (super hard coating)
Case Thickness: 12.7mm
Diameter: 39.5mm
Lug-to-lug: 46.4mm
Crystal: Sapphire crystal
Crystal Coating
Anti-reflective coating on inner surface
LumiBrite
Lumibrite on hands and index(es)
Band Material: Cow leather
Three-fold clasp with push button release
Distance between lugs: 20mm
Water Resistance: 20 bar
Magnetic Resistance: 4,800 A/m
LIMITED EDITION on the case back
Rotating compass inner ring
Screw-down crown
See-through & 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.
