SEIKO PROSPEX SPB427J1 WHALE LIMITED EDITION DIVER AUTOMATIC MEN WATCH THONG SIA EXCLUSIVE

Seiko Prospex SPB427J1 — Whale Thong Sia Exclusive Limited Edition Diver's Watch

The Seiko Prospex SPB427J1 is a Thong Sia Group regional exclusive — limited to 1,000 pieces across Singapore, Hong Kong, Macau, Malaysia, and Brunei. The design is inspired by the whale: the white dial references the vast, luminous surface of the open ocean, and the whale motif that defines this edition connects the watch directly to the marine environment it is built to perform in. The silver stainless steel case at 45mm carries the full Prospex diver's specification — Diver's 200M water resistance, unidirectional rotating bezel, and screw-down crown — in the compact 12.9mm profile that makes this size remarkably wearable for its dimensions.

Powered by the in-house 6R35 automatic calibre with hand-winding capability and a 70-hour power reserve, the SPB427J1 is mechanically dependable and practically complete. Lumibrite on the hands and hour markers ensures readability at depth and in low light, and the sapphire crystal protects the white dial through active daily use. The watch is presented in a special edition box with an additional white silicone strap — a complete package that marks it clearly as a collector's piece.

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
• White dial with baton markers — whale-inspired, ocean-luminous design centrepiece
• 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
• 45mm silver stainless steel case — substantial diver's proportions at 12.9mm 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
• Additional white silicone strap — ocean-connected alternative wear option included
• Special edition box — presentation-ready from the moment it arrives
• Thong Sia Group exclusive — 1,000 pieces, available across Singapore, Hong Kong, Macau, Malaysia, and Brunei

Why You'll Love It

The SPB427J1 is for the collector who wants a Thong Sia regional exclusive with a genuine design narrative — the whale inspiration is not a caseback engraving or a marketing label, it is the character of the dial itself. The white dial is rare in the Prospex diver lineup, and its specific reference to the marine creature that represents the deepest, most enduring relationship between the ocean and the surface world gives it a storytelling depth that standard colourway divers cannot replicate. The 6R35 calibre's 70-hour reserve handles any extended weekend, the Diver's 200M rating means it is genuinely ready for the water, and the special box and additional white silicone strap complete a collector's package that is considered in every detail. At 1,000 pieces regional, this is a genuinely scarce watch — and once it is gone, it will not return.

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 SPB427J1 carries that legacy forward in a Thong Sia exclusive that honours the ocean and the creatures that define it.

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

Explore the full Seiko Prospex Collection or browse all Seiko watches at City Chain Singapore.