The new series features Seiko’s first-ever use of a mechanical GMT movement in a Prospex diver’s watch.

Ever since its first diver’s watch in 1965, Seiko has developed new technologies, features, and designs that have made the Seiko Prospex diver’s watch collection a favorite among professional and recreational divers the world over. Through more than a half-century of innovation, Seiko has continuously pushed back the boundaries of where sports watches, and diver’s watches in particular, can go and how they can be used. Continuous enhancements over the decades in safety, reliability, legibility, and ease of use have made Seiko a leader in diver’s watches.

Today, Seiko introduces a new movement in the long-trusted 6R family that has a GMT function and a power reserve extended to a full 72 hours. Caliber 6R54 is presented in three new Prospex creations that are all modern re-interpretations of a Seiko classic from 1968.

 The bezels are made of ceramic to protect the watches from scratches and enhance durability.

The GMT hand can be set independently in one-hour increments without interrupting the time-of-day hands and allows the wearer to see, at a glance, the time in a second time zone. All three watches are water resistant to 200 meters, have Lumibrite on the hands and all 12 markers, and feature a scratch-resistant unidirectional ceramic bezel with a luminous pip. Each is presented on a new three-link stainless steel bracelet with a slim profile that allows it to sit securely and comfortably on the wrist.

The new Caliber 6R54

Alongside the classically styled green and black creations, which join the main Prospex collection, there is also a limited-edition watch that celebrates the 110th anniversary of Seiko’s, and Japan’s, first wristwatch.

The dial’s ice-blue color, combined with its delicate striated texture, creates a unique depth.

Distinguished by an intricately textured ice-blue dial, this watch captures the power of the Distinguished by an intricately textured ice-blue dial, this watch captures the power of the Seiko’s reputation for reliable and durable watches was forged in the 1960s and ‘70s, when adventurers and researchers wore them on expeditions to the North and South Poles.

The additional strap complements the dial in capturing the beauty of glacial ice.

The limited edition watch shares the same case and bracelet with the other two creations, but The limited edition watch shares the same case and bracelet with the other two creations, but a traditional Japanese braiding technique called Seichu.

The watch with the ice-blue dial is part of the Save the Ocean series, which is made in support of the Seiko Prospex mission to contribute to a greater understanding of the world’s oceans and their preservation.

All three watches will be available at the Seiko Boutiques and select retail stores worldwide from June 2023.

Seiko Prospex 1968 Diver’s Modern Re-interpretation GMT: SPB381, SPB383Seiko Watchmaking 110th Anniversary Seiko Prospex Save the Ocean Limited Edition: SPB385


Caliber 6R54
Driving system: Automatic
Frequency: 21,600 vibrations per hour (6 beats per second)
Power reserve: 72 hours
Number of jewels: 24
Diameter: 27.4mm, Thickness: 5.3mm
GMT function / Independent 24-hour hand adjustment function  

Stainless steel case and bracelet with super-hard coating
Sapphire crystal with anti-reflective coating
Screw-down crown, screw case back
Ceramic bezel
Lumibrite on hands and indexes
Water resistance: 200m diver’s
Magnetic resistance: 4,800 A/m
Diameter: 42.0mm, Thickness: 12.9mm
Stainless steel bracelet with three-fold clasp with push button
release, secure lock, and extender
Additional recycled polyester strap included (SPB385)
Recommended retail prices in Europe:
 €1,700 (SPB381, SPB383), €1,900 (SPB385)
Limited Edition of 4,000 (SPB385)

For further information

Special web page:

Seiko Prospex web page:

Note: The specifications and price information in this release are as of the published date and are subject to change.