SEIKO PROSPEX HBC002J1 1968 HERITAGE AUTOMATIC GMT DIVER'S MEN WATCH

Seiko Prospex HBC002J1 — 1968 Heritage Automatic GMT Diver's Watch

The Seiko Prospex HBC002J1 is a modern re-interpretation of the legendary 1968 Diver's watch — Japan's first hi-beat one-piece diver's watch, and the foundation of Seiko's sixty years of diving watch innovation. The HBC002J1 honours that heritage in every detail while bringing it firmly into the present: powered by the in-house 6R54 calibre, the first movement with mechanical GMT capabilities ever used in a Seiko dive watch, it is a milestone timepiece in the Prospex story.

Built for professional and recreational divers who demand both precision and wearability, the HBC002J1 pairs a 42mm stainless steel case with a Japanese ceramic unidirectional rotating bezel, sapphire crystal, and 300M water resistance. The bracelet is engineered for comfort with a low centre of gravity and short-pitch construction, while the micro-adjustment clasp allows incremental fit personalisation. A three-day power reserve and Lumibrite on hands and markers complete a specification that performs as impressively in the field as it looks on the wrist.

Key Features

• Seiko 6R54 automatic movement with manual winding — the first mechanical GMT calibre used in a Seiko dive watch
• GMT function — mechanical 24-hour GMT hand independently settable to a second time zone
• Approx. 72-hour (3-day) power reserve — reliable performance through a long weekend without wearing
• 300M Diver's water resistance — built to professional diving standards
• Japanese ceramic unidirectional rotating bezel — scratch-resistant, precise, and purpose-built for dive timing
• Sapphire crystal — premium scratch resistance and superior optical clarity
• Lumibrite on hands and hour markers — superior legibility in low light and underwater conditions
• 42mm stainless steel case — substantial dive watch proportions with a 13.3mm slim profile
• Screw-down crown — water integrity protection for diving use
• Baton dial markers on black dial — clean, high-contrast legibility at depth
• Date display — everyday practicality built in
• 24-hour hand indicator — dual time zone reference at a glance
• Stainless steel bracelet with low centre of gravity and short-pitch construction — engineered for all-day comfort
• Three-fold clasp with secure lock, push-button release, and solid slide adjuster — micro-adjustable for a personalised fit
• Accuracy: +25/-15 seconds per day — reliable automatic timekeeping

Why You'll Love It

The HBC002J1 is more than a dive watch — it is a piece of Seiko history made wearable for today. The 6R54 mechanical GMT movement is a genuine first for the Prospex dive line, and the 1968 heritage design gives it a visual character that modern dive watches rarely achieve — purposeful, bold, and rooted in a real moment of Japanese watchmaking innovation. The ceramic bezel is virtually unscratchable in daily use, the sapphire crystal keeps the dial pristine, and the 300M water resistance means it is genuinely ready for the dive. The micro-adjustment clasp and low centre of gravity bracelet make it one of the most comfortable dive watches to wear all day on land as well as underwater. A landmark Seiko Prospex for the serious collector and the serious diver alike.

The Seiko Prospex Story

Prospex is a combination of the words "Professional" and "Specifications." Seiko Prospex timepieces are designed to be practical, reliable, and durable — built to meet the high standards required in extreme environments for sports lovers and adventure seekers alike. The 1968 Diver's watch was a turning point in that story — Japan's first hi-beat one-piece diver's watch set the standard for what a professional dive watch could be, and the HBC002J1 carries that sixty-year legacy forward with the most technically advanced movement ever fitted to a Seiko dive watch.

Backed by Seiko's official warranty. Authentic Seiko Prospex watch, sold by authorised retailer City Chain Singapore.

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