Seiko Prospex SRPE33K1 — Save the Ocean Automatic Diver's Watch

The Seiko Prospex SRPE33K1 is a Save the Ocean Special Edition built on the Samurai case — the angular, blade-inspired design that gives the King Samurai its commanding presence and its name. Part of Seiko Prospex's ongoing marine conservation initiative, the Save the Ocean series connects the watch directly to the environment it is built to perform in: the blue dial references the ocean, and a portion of proceeds supports ocean protection efforts. The SRPE33K1 wears on a silver stainless steel bracelet, giving it a more formal and versatile character than the blue silicone SRPF79K1 sibling — the same Samurai case and Save the Ocean commitment, in a bracelet execution suited to daily and smart-casual wear.

Powered by the in-house 4R35 automatic calibre with hand-winding capability and a 41-hour power reserve, the SRPE33K1 delivers the full Prospex diver's specification — Diver's 200M water resistance, unidirectional rotating bezel, and screw-down crown. The sapphire crystal protects the blue dial through active daily use, and Lumibrite on the hands and hour markers ensures readability at depth and in low light. At 43.8mm and just 12.8mm slim, it wears with the comfortable, angular presence that defines the Samurai case.

Key Features

• Seiko 4R35 automatic movement with manual winding — self-winding with the convenience of hand-winding when needed
• Approx. 41-hour power reserve — dependable performance through extended daily wear
• Accuracy: +45/-35 seconds per day — reliable automatic timekeeping
• Diver's 200M water resistance — built for recreational diving and water sports
• Blue dial with baton markers — ocean-connected Save the Ocean 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
• Sapphire crystal — premium scratch resistance and superior optical clarity
• 43.8mm silver stainless steel case — Samurai angular proportions at an exceptionally slim 12.8mm profile
• Screw-down crown — water integrity protection for diving use
• Date display — everyday practicality built in
• Silver stainless steel bracelet — versatile, durable, and corrosion-resistant
• Save the Ocean Special Edition — part of Seiko Prospex's marine conservation initiative

Why You'll Love It

The SRPE33K1 is the Save the Ocean King Samurai for those who want the angular Samurai design and the ocean conservation narrative in a bracelet execution. The stainless steel bracelet gives it a versatility that the silicone-strapped SRPF79K1 does not share — it transitions from active wear to smart-casual to the office without a strap change, while still carrying the Diver's 200M rating and the Save the Ocean commitment that defines the series. The Samurai case is known for its angular, assertive design and its slim 12.8mm profile that wears more comfortably than the 43.8mm diameter suggests. The sapphire crystal keeps the dial pristine, and the Lumibrite handles legibility at any time of day or depth.

SRPE33K1 vs SRPF79K1 — Bracelet or Silicone?

Both models are Save the Ocean King Samurai diver's watches sharing the same 4R35 calibre, 43.8mm Samurai case, 12.8mm profile, blue dial, Diver's 200M water resistance, sapphire crystal, screw-down crown, Lumibrite, and date display. The differences are in the bezel and strap. The SRPE33K1 has a standard unidirectional rotating bezel and a silver stainless steel bracelet — the more versatile and formal everyday choice. The SRPF79K1 has a ceramic unidirectional rotating bezel and a blue silicone strap — the more ocean-committed, active-wear choice that colour-matches dial to strap. Same Save the Ocean Samurai, two different wear contexts.

About Seiko Save the Ocean

Seiko's Save the Ocean initiative reflects the Prospex brand's commitment to the marine environment that its dive watches are built to perform in. Save the Ocean Special Editions carry a design brief that references the ocean directly — in the dial colour, the strap choice, and the conservation partnerships that the initiative supports. The SRPE33K1 is one expression of that brief: a professional diver's watch with an ocean-connected aesthetic and a clear statement of purpose behind the purchase.

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 SRPE33K1 carries that sixty-year legacy forward with a commitment that extends beyond the watch itself.

Backed by Seiko's official warranty. Authentic Seiko Prospex Save the Ocean Special Edition watch, sold by authorised retailer City Chain Singapore.

Also available: King Samurai with ceramic bezel and blue silicone strap — SRPF79K1. Explore the full Seiko Prospex Collection or browse all Seiko watches at City Chain Singapore.