SEIKO PROSPEX SRPK01K1 GREAT BLUE TURTLE SCUBA PADI AUTOMATIC SPECIAL EDITION MEN WATCH

Seiko Prospex SRPK01K1 — "The Great Blue" PADI Special Edition Diver's Watch

The Seiko Prospex SRPK01K1 "The Great Blue" is a PADI Special Edition diver's watch in the Turtle case — a collaboration between Seiko Prospex and PADI, the Professional Association of Diving Instructors and the world's most recognised diver's training organisation. "The Great Blue" references the vast open ocean that PADI certification is designed to unlock, and the blue dial and silver stainless steel case express that reference directly in the design. The Turtle cushion-shaped case provides the comfortable, distinctive wrist presence that has made this silhouette one of the most beloved in the Seiko Prospex family for nearly five decades.

Powered by the in-house 4R36 automatic calibre with hand-winding capability and a 41-hour power reserve, the SRPK01K1 delivers the full Prospex diver's specification — Diver's 200M water resistance, ceramic unidirectional rotating bezel, and screw-down crown — in the Turtle's distinctive cushion-shaped case at 45mm and 13.22mm slim. The sapphire crystal with magnifier ensures the day-date display is clearly readable at any angle and in any light. Lumibrite on the hands and hour markers delivers legibility at depth and in low light. Presented with a special edition PADI box.

Key Features

• Seiko 4R36 automatic movement with manual winding — self-winding with the convenience of hand-winding when needed
• Approx. 41-hour power reserve — dependable everyday performance
• 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 Great Blue colourway
• 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 with magnifier — premium scratch resistance with enhanced date and day legibility
• 45mm silver stainless steel case — Turtle cushion proportions at 13.22mm slim profile
• Screw-down crown — water integrity protection for diving use
• Day-date display — full calendar functionality 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 SRPK01K1 is the PADI Great Blue in the Turtle case — the more accessible of the two Great Blue PADI editions, with the 4R36 calibre and 41-hour reserve making it the entry point into the Great Blue family at a significantly lower price than the SPB375J1 Sumo. The Turtle case shape is known for its exceptional comfort at 45mm — the cushion proportions sit closer to the wrist and distribute the case width more naturally than a standard round case — and the PADI Special Edition designation connects it to the professional diving community through the world's most recognised certification body. The ceramic bezel is virtually unscratchable in daily use, the sapphire crystal with magnifier keeps the day-date readable, and the Lumibrite ensures legibility from dusk to depth.

SRPK01K1 vs SPB375J1 — Turtle or Sumo? Which Great Blue PADI Should You Choose?

Both models are PADI Great Blue Special Editions with ceramic bezels, sapphire crystals, blue dials, and Diver's 200M water resistance. The differences are in the case shape, calibre, and specification. The SRPK01K1 has the Turtle cushion case with the 4R36 calibre and 41-hour power reserve. The SPB375J1 has the Sumo case with the 6R35 calibre and 70-hour power reserve — the more specified and more expensive of the two. The Turtle is the more wearable and more accessibly priced choice; the Sumo offers more calibre capability and the bolder wrist presence. Both share the Great Blue PADI credential — the choice is in the case shape and specification depth.

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 SRPK01K1 carries that legacy forward in a PADI Special Edition that honours the Great Blue and the professional diving community it serves.

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

Also available: Great Blue Sumo — SPB375J1 and 1965 Heritage PADI — SPB501J1. Explore the full Seiko Prospex Collection or browse all Seiko watches at City Chain Singapore.