SEIKO HBC001J1 Men's Prospex 1968 Heritage GMT Automatic Dive Watch, Green Dial, Stainless Steel Bracelet, Sapphire Crystal, 300M Water Resistant

Items Description

The SEIKO HBC001J1 Men's Prospex 1968 Heritage GMT Automatic Dive Watch is a mechanical timepiece designed for divers, frequent travellers, and watch enthusiasts who value functional tool-watch design. Inspired by Seiko's 1968 diver's watch heritage, this model combines a modern GMT complication with a 42.0 mm stainless steel case, offering dual-time readability for those who cross time zones regularly or work in global environments.

 

This particular Prospex reference features a green dial paired with a steel bracelet, creating a connection to the brand's long-standing relationship with the ocean while maintaining a versatile look for both diving and everyday wear. Powered by the in-house Calibre 6R54 automatic movement, the watch delivers a power reserve of approximately 72 hours and robust 300-meter water resistance, positioning it as a practical companion for professional use and serious recreational diving.

 

Key Advantages of the SEIKO HBC001J1 Men's Prospex 1968 Heritage GMT Automatic Dive Watch, Green Dial, Stainless Steel Bracelet, Sapphire Crystal, 300M Water Resistant

 

1. Calibre 6R54 Automatic GMT Movement

The 6R54 calibre is the technical core of this Prospex model, designed to address the needs of frequent travellers and dive professionals. This 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour and incorporates a GMT function that displays a second time zone on the dial, allowing the wearer to track home time and local time simultaneously.

 

• Power Reserve: Approximately 72 hours when fully wound, supporting extended wear between uses.
• Independent Hour Hand: Allows quick local time adjustment without disturbing the minute hand or stopping the movement.
• Hacking Feature: The seconds hand halts when setting time, enabling precise synchronisation with a reference source.
• Maiden versus Date: A date window positioned at 4:30 adds everyday practicality for desk divers and office use.

 

2. Design Language Rooted in 1968 Heritage

Seiko has designed this watch as a direct homage to its 1968 professional diver's model, which introduced a higher water resistance rating and a larger case profile at the time. The HBC001J1 retains the distinctive angular lugs and broad bezel proportions of that original design, while the green dial and black ceramic bezel insert add a contemporary colour narrative that stands apart from the black and blue references in the same collection.

 

• Bezel Insert: Ceramic material resists fading and scratching, maintaining legibility after long-term use in harsh environments.
• Dial Finish: The green sunburst dial shifts its tone under different lighting conditions, moving from a deep forest shade to a lighter emerald hue.
• Handset: Broad sword-style hands and applied markers are filled with Seiko's Lumibrite, ensuring high visibility in low-light underwater conditions.

 

3. Professional-Grade Water Resistance and Case Construction

With a water resistance rating of 300 metres, this watch is engineered for saturation diving, not just casual swimming or snorkelling. The stainless steel case measures 42.0 mm in diameter and 13.3 mm in thickness, delivering a balanced presence on the wrist that suits both professional divers and those who prefer a substantial tool watch for daily wear.

 

• Screw-Down Crown: Threaded case back and crown mechanism provide a secure seal against water ingress at depth.
• Case Diameter: 42.0 mm offers a versatile fit that wears comfortably on medium to larger wrists, while maintaining enough heft for a professional appearance.
• Thickness: 13.3 mm profile aligns with vintage-style diver proportions, allowing easy sliding under a wetsuit cuff or dress shirt.
• Stainless Steel Bracelet: Solid links with a secure clasp ensure the watch stays firmly attached during vigorous movement underwater or on land.

 

4. Sapphire Crystal for Clarity and Durability

The top surface of this Prospex is protected by a sapphire crystal, which offers superior scratch resistance compared to mineral glass or acrylic. This is a critical feature for a diver's watch, as the crystal is the most exposed component during underwater activities, where contact with rocks, reef structures, or equipment is common.

 

• Scratch Resistance: Sapphire rates high on the Mohs scale, resisting fine scratches that would otherwise obscure dial legibility over time.
• Anti-Reflective Coating: Treatments on the crystal reduce glare during bright surface conditions, improving readability when sunlight hits the dial directly.
• In-House Application: Seiko applies a magnifying lens over the date window, a functional touch that makes the calendar more accessible during a quick glance.

 

The SEIKO HBC001J1 Men's Prospex 1968 Heritage GMT Automatic Dive Watch, Green Dial, Stainless Steel Bracelet, Sapphire Crystal, 300M Water Resistant is best suited for divers and global travellers who need a reliable mechanical watch with true dual-time functionality and professional-grade depth rating.

 

For those who wear a watch through a busy week of flights, meetings, and weekend water activities, this model offers the convenience of a GMT hand, the durability of a 300-metre case, and an aesthetic that connects Seiko's modern manufacturing with a celebrated chapter of its diving history.

Specifications of SEIKO HBC001J1 Men's Prospex 1968 Heritage GMT Automatic Dive Watch, Green Dial, Stainless Steel Bracelet, Sapphire Crystal, 300M Water Resistant

Brand Name	SEIKO
Model number	HBC001J1
Band Color	Silver
Dial color	Green
Display	Analog
Watch Movement Type	Automatic
Additional Features	300m Water Resistant
Power Source	Automatic Movement
Strap Type	Bracelet, Stainless Steel
Water Resistance Depth	300 meters
Sport Type	Diving
Clasp Type	Fold-over With Safety
Water Resistance Level	Water Resistant
Embellishment Feature	Crystal
Closure Type	Buckle
Style Name	Luxury Diver
Shape	Round
Theme	Diving
Pattern	Solid
Face Style	Luminous Markers
Bezel Color	Green

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Specifications
[Brand Name ]	SEIKO
[Model number ]	HBC001J1
[Band Color ]	Silver
[Dial color ]	Green
[Display]	Analog
[Watch Movement Type]	Automatic
[Additional Features]	300m Water Resistant
[Power Source]	Automatic Movement
[Strap Type]	Bracelet, Stainless Steel
[Water Resistance Depth]	300 meters
[Sport Type]	Diving
[Clasp Type]	Fold-over With Safety
[Water Resistance Level]	Water Resistant
[Embellishment Feature]	Crystal
[Closure Type]	Buckle
[Style Name]	Luxury Diver
[Shape]	Round
[Theme]	Diving
[Pattern]	Solid
[Face Style]	Luminous Markers
[Bezel Color]	Green

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