SEIKO PROSPEX SPB317J1 HERITAGE TURTLE 1968 RE-INTERPRETATION MEN WATCH

Seiko Prospex SPB317J1 — 1968 Heritage Turtle Automatic Diver's Watch

The Seiko Prospex SPB317J1 is a modern re-interpretation of Seiko's 1968 Professional Diver's Watch in the Turtle case — and the silicone strap sibling to the SPB315J1. The cushion-shaped case, affectionately nicknamed the "Turtle" by collectors for its distinctive profile, preserves the essential proportions of the 1968 original: the 41.0mm diameter, the 12.3mm slim profile, and the purposeful bezel-and-dial aesthetic that makes the 1968 Heritage immediately recognisable. The black silicone strap gives this variant an active, water-ready character that the stainless bracelet SPB315J1 does not share — the natural choice for those who want the 1968 Heritage at depth.

Powered by the in-house 6R35 automatic calibre with hand-winding capability and a 70-hour power reserve, the SPB317J1 delivers the full Diver's 200M specification — screw-down crown and unidirectional rotating bezel — with the curved sapphire crystal protecting the black dial through active use. Lumibrite on the hands and hour markers ensures readability at depth and in low light. At 41.0mm and 12.3mm slim with a 46.9mm lug-to-lug, the Turtle case wears with exceptional comfort for its dimensions.

Key Features

• Seiko 6R35 automatic movement with manual winding — self-winding with the convenience of hand-winding when needed
• Approx. 70-hour power reserve — dependable performance through an extended weekend without wearing
• Accuracy: +25/-15 seconds per day — dependable automatic timekeeping
• Diver's 200M water resistance — built for recreational diving and water sports
• Black dial with baton markers — clean, purposeful 1968 Heritage design language
• Lumibrite on hands and hour markers — superior legibility in low light and underwater conditions
• Unidirectional rotating bezel — purpose-built for safe and accurate dive timing
• Curved sapphire crystal — premium scratch resistance and superior optical clarity
• 41.0mm silver stainless steel case — 1968 Heritage Turtle proportions at 12.3mm slim profile
• Screw-down crown — water integrity protection for diving use
• Date display — everyday practicality built in
• Black silicone strap — comfortable, secure, and water-ready for active diving and daily wear

Why You'll Love It

The SPB317J1 is the 1968 Heritage Turtle for those who want the heritage case on a strap — and for diving use, the silicone strap is the more practical choice. The black silicone sits securely on the wrist under a wetsuit, dries instantly after the water, and keeps the 12.3mm slim profile as close to the wrist as possible. The Turtle case shape remains the primary reason to choose this watch: the cushion proportions distribute its 41.0mm diameter with exceptional comfort, the 6R35 calibre's 70-hour reserve handles any extended weekend, and the curved sapphire crystal keeps the black dial pristine through active daily use. The 1968 Heritage story in its most water-ready expression.

SPB317J1 vs SPB315J1 — Silicone or Bracelet?

Both models share identical specifications — the same 6R35 calibre, 41.0mm silver stainless case, 12.3mm depth, Diver's 200M water resistance, curved sapphire crystal, screw-down crown, unidirectional bezel, Lumibrite, and date display. The difference is entirely in the strap. The SPB317J1 has a black silicone strap — the more practical choice for diving and active wear, and the more casual everyday option. The SPB315J1 has a silver stainless steel bracelet — the more versatile and formally wearable choice. Same 1968 Heritage Turtle specification, two completely different wear characters.

About the 1968 Heritage and the Turtle

The Seiko Professional Diver's Watch of 1968 was a successor to the 62MAS and introduced the cushion case profile that would become the Turtle — one of the most beloved and enduring silhouettes in Seiko's dive watch history. The Turtle nickname, bestowed by collectors, references the shell-like case shape that gives the watch its characteristic comfort and instantly recognisable character. The 1968 Heritage series preserves the essential design DNA of the original while adding decades of refinement in materials, movement, and water resistance.

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 story begins in 1881, when Kintaro Hattori founded a clock and watch shop in Ginza, Tokyo — the business that would become the Seiko of today. Since 1965, when Seiko created Japan's first diver's watch, the Prospex dive line has stood for underwater precision and reliability. The SPB317J1 carries that sixty-year legacy forward in the most active-ready expression of the 1968 Heritage Turtle.

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

Also available in stainless steel bracelet — shop the SPB315J1. Explore the full Seiko Prospex Collection or browse all Seiko watches at City Chain Singapore.