Seiko Prospex GMT Automatic

For the first time, the Seiko Prospex collection is offering a GMT diving watch with a mechanical movement. The new Prospex GMT series is comprised of three automatic watches, and all of them are modern re-interpretations of a Seiko classic diver from 1968.

Seiko Prospex 1968 Diver’s Modern Re-interpretation GMT
Image Credit @ Seiko

Models SPB381J1 and SPB383J1

The first two – SPB381J1 and SPB383J1 – represents two versions of the Prospex 1968 Diver’s Modern Re-interpretation GMT watch. Among them, Seiko Prospex GMT SPB381 features a green dial and a green ceramic bezel insert. The second model (reference SPB383) has a black dial and a black ceramic bezel insert.

The third watch in the new series is Seiko Watchmaking 110th Anniversary Seiko Prospex Save the Ocean Limited Edition (reference SPB385J1).

Seiko Prospex 1968 Diver’s Modern Re-interpretation GMT Reference SPB381/ Image Credit @ Seiko

To equip these new timepieces, Seiko has manufactured a new automatic movement in the 6R family. The new Caliber 6R54 offers a GMT function and a power reserve extended to a full 72 hours.

The GMT hand can be set independently in one-hour increments without interrupting the hands that display the time of primary time zone. This arrangement allows the wearer to quickly identify the time in a second time zone.

The 42mm diameter case is made of super hard-coated stainless steel. They also feature a unidirectional bezel with a scratch-proof ceramic bezel-insert featuring luminous pip. Moreover, these models come with the proprietary Lumibrite luminous pigment coating on the hands and all 12 markers.

Seiko Prospex 1968 Diver’s Modern Re-interpretation GMT Reference SPB383/ Image Credit @ Seiko

The new three-link stainless steel bracelet with a slim profile sits securely and comfortably on the wrist.

Model: SEIKO Prospex GMT SPB385

Limited to 4,000 pieces, the Seiko Prospex GMT SPB385 Save the Ocean Limited Edition celebrates the 110th anniversary of Seiko’s, and Japan’s, first wristwatch. This model boasts an intricately textured ice-blue dial inspired by the polar glaciers.

Seiko Watchmaking 110th Anniversary Seiko Prospex Save the Ocean Limited Edition Reference SPB385/ Image Credit @ Seiko

The Seiko Prospex GMT watch with the ice-blue dial (reference SPB385) is part of the Save the Ocean series. This model shares same case and bracelet with the other two creations.

It is also provided with an additional strap made entirely of recycled plastic bottles using a traditional Japanese braiding technique called Seichu.

Image Credit @ Seiko

Water resistant to 200 meters, these new recreational diving timepieces come with screw-in, stainless steel case-backs. The limited edition Save the Ocean variant features individual serial number on the case-back.

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

Technical details

Seiko Prospex 1968 Diver’s Modern Re-interpretation GMT: SPB381 and SPB383
Seiko 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 with super-hard coating
Sapphire crystal with anti-reflective coating
Screw-down crown, screw case back
Bezel with ceramic insert
Lumibrite on hands and indexes
Water resistance: 200m diver’s
Magnetic resistance: 4,800 A/m
Diameter: 42.0mm
Thickness: 12.9mm

Stainless steel super-hard coated bracelet with three-fold clasp with push button release, secure lock, and extender
Additional recycled polyester strap included (SPB385)

Recommended retail prices in Europe
SPB381: €1,700
SPB383: €1,700
SPB385: €1,900

SPB385: Limited edition of 4,000 pieces


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