SEIKO PROSPEX SPB375J1 GREAT BLUE SUMO SCUBA PADI AUTOMATIC SPECIAL EDITION MEN WATCH

Seiko Prospex SPB375J1 — "The Great Blue" PADI Special Edition Diver's Watch

The Seiko Prospex SPB375J1 "The Great Blue" is a PADI Special Edition diver's watch — a collaboration between Seiko Prospex and PADI, the Professional Association of Diving Instructors and the world's most recognised diver's training organisation. The name references the "Great Blue" — the vast, deep expanse of the open ocean that defines the diving experience — and the blue dial and silver stainless steel case capture that reference directly in the design. The Sumo case shape, with its distinctive wide proportions and exceptional wrist comfort at 45mm, provides the physical presence that the Great Blue narrative demands.

Powered by the in-house 6R35 automatic calibre with hand-winding capability and a 70-hour power reserve, the SPB375J1 delivers the full Prospex diver's specification — Diver's 200M water resistance, ceramic unidirectional rotating bezel, and screw-down crown — in a case finished with super-hard coating for durability. 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. Presented with a special edition PADI box, it is as considered in presentation as it is in specification.

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
• Blue dial with baton markers — ocean-connected colourway in the Great Blue tradition
• Lumibrite on hands and hour markers — superior legibility in low light and underwater conditions
• Black ceramic unidirectional rotating bezel — scratch-resistant, precise, and purpose-built for dive timing
• Sapphire crystal — premium scratch resistance and superior optical clarity
• 45mm silver stainless steel case with super-hard coating — Sumo proportions at 13.4mm 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
• PADI Special Edition with special box — created with the world's most recognised diver's training organisation

Why You'll Love It

The SPB375J1 is the Sumo case at its most PADI-dedicated — "The Great Blue" is not a colour description, it is a statement of purpose, connecting the watch directly to the vast open ocean environment that PADI certification is designed to unlock. The Sumo case shape is known for its exceptional wrist comfort at 45mm — the cushion-like proportions distribute the case weight differently from a standard round case, making it one of the most comfortable 45mm dive watches to wear all day. The ceramic bezel is virtually unscratchable in daily use, the sapphire crystal keeps the dial pristine, and the 70-hour reserve handles any extended weekend. A PADI diver built on one of the most beloved case shapes in the Prospex lineup.

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 SPB375J1 carries that legacy forward in a PADI Special Edition that honours the professional diving community and the Great Blue that defines it.

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

Also available in the PADI range: 1965 Heritage PADI — SPB501J1. Explore the full Seiko Prospex Collection or browse all Seiko watches at City Chain Singapore.