SEIKO PROSPEX SPB315J1 HERITAGE TURTLE 1968 RE-INTERPRETATION MEN WATCH

Seiko Prospex SPB315J1 — 1968 Heritage Turtle Automatic Diver's Watch

The Seiko Prospex SPB315J1 is a modern re-interpretation of Seiko's 1968 Professional Diver's Watch — the model that succeeded the original 62MAS and introduced what would become the most beloved case shape in Seiko's dive watch history. The cushion-shaped case, affectionately nicknamed the "Turtle" by collectors for its distinctive profile, makes its first appearance here in the 1968 Heritage designation: faithful to the original proportions, updated with sixty years of refinement in materials and movement. The black dial in the silver stainless steel case with the unidirectional rotating bezel preserves the clean, purposeful aesthetic of the 1968 original.

Powered by the in-house 6R35 automatic calibre with hand-winding capability and a 70-hour power reserve, the SPB315J1 is mechanically dependable and practically complete. The Diver's 200M water resistance and screw-down crown meet the full professional dive specification. At 41.0mm and 12.3mm slim — with a 46.9mm lug-to-lug — the 1968 Heritage Turtle wears with exceptional comfort despite its apparent size, precisely as the original Turtle case has always done. Lumibrite on the hands and hour markers ensures readability at depth and in low light. The curved sapphire crystal protects the black dial through active daily use.

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
• Silver stainless steel bracelet — durable, comfortable, and corrosion-resistant

Why You'll Love It

The SPB315J1 is the 1968 Heritage Turtle for the collector who wants the case shape with a direct historical reference. The Turtle has earned its reputation across decades of production for being one of the most comfortable 41mm dive watches available — the cushion shape distributes the case width across a larger wrist contact area than a standard round case, and the 12.3mm slim profile keeps it wearable through a full day. The black dial is the most historically faithful expression of the 1968 original, the 6R35 calibre's 70-hour reserve handles any extended weekend, and the curved sapphire crystal keeps the dial pristine through active daily use. A heritage diver with a sixty-year story in the most beloved case shape Seiko has ever produced.

About the 1968 Heritage and the Turtle

The Seiko Professional Diver's Watch of 1968 was a successor to the 62MAS and introduced what would become the Turtle case shape — the distinctive cushion profile that has defined collector affection for the Prospex dive line ever since. The Turtle nickname, bestowed by collectors rather than Seiko, references the shell-like case shape that gives the watch its characteristic comfort and instantly recognisable silhouette. The 1968 Heritage series preserves the essential design DNA of the original while adding decades of refinement in materials, movement, and water resistance. The SPB315J1 carries that story forward.

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 SPB315J1 carries that sixty-year legacy forward in the case shape that defined a generation of Seiko dive watch collectors.

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

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