Seiko's New Anniversary Marinemaster Dive Watch Is a Exclusive Must-Have

It’s been 60 years since Seiko introduced Japan’s first dive watch. Over the six decades that followed the debut, the watchmaker has continued to push the boundaries of what could be expected from these dynamic timepieces. Increased concentration on safety and reliability helped the brand build an immense following of its underwater tickers that today is represented by its Prospex collection.

Now, with its 60th anniversary finally here, Seiko is commemorating the milestone with the addition of three new watches into the series: the Marinemaster, as well as the silver-dialed homage to their 1965 diver’s watch and a blue-dialed version made to reflect the design of their 1968 diver’s watch.

Seiko Prospex Marinemaster SLA081 Watch<p>Courtesy Image</p> — Seiko Prospex Marinemaster SLA081 Watch

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The Marinemaster SLA081 may be the most-impressive of the bunch, though, featuring everything from a new Caliber 8L45 mechanical watch movement, a one-piece titanium case that’s water resistant up to 600 meters, and a stainless-steel bezel that’s been treated with diamond-like carbon coating made to be scratch resistant.

The Caliber 8L45 movement uses Seiko’s proprietary titanium alloy, Spron, which was designed for durability against breakage, rust, and wear. It also provides 72 hours of power reserve and operates within a tolerance of +10 to -5 seconds per day.

The case features the word “PROFESSIONAL” inscribed across the dial, while a specially developed L-shaped gasket prevents helium infiltration, eliminating the need for an escape valve.

<em>Seiko Prospex Sea SB509 and </em><em>Seiko Prospex Sea </em>SPB511<em> Watches</em><p>Courtesy Image</p> — *Seiko Prospex Sea SB509 and* *Seiko Prospex Sea* SPB511 Watches

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The Marinemaster uses classic Seiko dive watches to influence its design, including their 1975 release. A textured dial, meanwhile, reminds wearers of the deep sea, while a thick finish enhances the level of perceivable depth. The bracelet is made from titanium and features rounded links for added flexibility and comfort.

With the Seiko Prospex collection,the brand actively supports the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) research team. The Marinemaster will become part of JAMSTEC’s Arctic research program in 2025.

Just 600 of these watches will be released in select Seiko Boutiques and retail stores worldwide come July, and are priced at $4,600. The silver SPB511 is priced at $1,400 and available in May while the blue SB509 costs $1,750 and drops in June with only 6,000 pieces.