SEIKO PROSPEX SRPK43K1 BLACK SERIES NIGHT VISION TURTLE DIVER MEN WATCH

Seiko Prospex SRPK43K1 — The Black Series Automatic Diver's Watch

The Seiko Prospex SRPK43K1 is "The Black Series" in the Turtle case — an all-black hardcoated execution of the beloved Turtle silhouette that first appeared in the Prospex lineup in 1975 and has carried a devoted following ever since. The case, ceramic bezel, dial, and stainless steel bracelet are all rendered in black, creating a unified, stealthy aesthetic that the standard Turtle colour variants do not share. Powered by the in-house 4R36 automatic calibre with hand-winding capability and a 41-hour power reserve, the SRPK43K1 delivers the full Prospex diver's specification — Diver's 200M water resistance, screw-down crown, ceramic unidirectional bezel — in the Turtle's distinctive cushion-shaped case.

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 the legibility the all-black dial demands in low light and underwater. At 45mm (47.7mm lug to lug) and 13.2mm slim, the Turtle case wears with the comfortable, cushioned wrist presence that has made it one of the most enduring and popular shapes in the Seiko Prospex family.

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 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
• All-black execution — hardcoated case, ceramic bezel, black dial, and black stainless steel bracelet throughout
• Black ceramic unidirectional rotating bezel — scratch-resistant, precise, and purpose-built for dive timing
• Black dial with baton markers — total tonal coherence across every element
• Lumibrite on hands and hour markers — superior legibility in low light and underwater conditions
• Sapphire crystal with magnifier — premium scratch resistance with enhanced date and day legibility
• 45mm stainless steel case with hard coating — Turtle cushion-shaped proportions at 13.2mm profile
• Screw-down crown — water integrity protection for diving use
• Day-date display — full calendar functionality built in
• Black stainless steel bracelet — all-black aesthetic completed from case to clasp

Why You'll Love It

The SRPK43K1 is for the collector who wants the Turtle case shape in its most committed all-black expression. The Turtle silhouette has a comfort and distinctive character that makes it uniquely wearable for its 45mm size — the cushion shape distributes the case weight differently from a standard round case and sits closer to the wrist, making it more comfortable for all-day wear than the dimensions suggest. The Black Series treatment amplifies everything the Turtle already does well: the ceramic bezel is virtually unscratchable, the sapphire crystal with magnifier keeps the day-date legible, and the Lumibrite ensures it is readable long after the lights go out. An all-black Turtle diver that earns every one of its credentials.

About the Seiko Prospex Turtle

The "Turtle" nickname — among the most affectionately used in the Seiko collector community — refers to the distinctive cushion-shaped case that first appeared in the Seiko Professional Diver's 600m reference of 1975. The rounded, wide case with its characteristic lug shape has been compared to the shell of a turtle, and the name has stuck across five decades and dozens of re-interpretations. The cushion shape is not just aesthetic: it contributes to the watch's exceptional wrist comfort, distributing the case width across a larger wrist contact area than a standard round case. The SRPK43K1 brings that design into The Black Series — the most tonally unified expression of the Turtle to date.

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 SRPK43K1 carries that legacy forward in The Black Series — the most visually committed expression of the Turtle diver in the current Prospex lineup.

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

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