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A 1968 Seiko classic is re-born and returns to the Antarctic.

Seiko’s, and Japan’s, first diver’s watch was born in 1965. With water resistance to 150m and An automatic movement, it proved its high quality and reliability when worn by members of The 8th Japanese Antarctic Research Expedition in 1966. Thanks to the positive reaction of the Members of the expedition on their return, Seiko’s diver’s watches were chosen by the same Research team between the years 1966 and 1969, during which time the landmark Seiko diver’s Watch with 300m water resistance and a 10-beat automatic movement was created, in 1968. Today, Seiko introduces into the Prospex collection a new interpretation of the 1968 diver’s Watch that is even better equipped to meet the challenge of the most extreme conditions On earth. This watch, with its advanced specifications, will be worn by members of the 63rd Japanese Antarctic Research Expedition’s mission to Antarctica.

The original 1968 diver’s watch.

A heritage design, with the most advanced technologies

The SLA055J1 case is in Seiko’s Ever-Brilliant Steel for maximum corrosion resistance.

While the design reflects its heritage, every aspect of this new creation exemplifies the high levels of diver’s watch technology for which the Prospex collection is renowned. The case, bezel and crown are all made of Seiko’s Ever-Brilliant Steel, a grade of stainless steel* which is more corrosion resistant than that which is commonly used in watches today. To further ensure the watch’s durability, the crown is not screwed directly into the case but locked into a separate component that is built into the case and so can be more easily replaced.

*This material is used extensively in the surfaces of marine structures and vessels because of its extreme corrosion resistance in sea water. It has a PREN (Pitting Resistance Equivalent Number) value 1.7 times higher than that of the grade of steel used in most high-end watches. PREN is a widely accepted standard used to measure corrosion resistance.

Caliber 8L35, created especially for Seiko’s leading diver’s watches.

The watch is powered by Caliber 8L35 which was developed especially for diver’s watches and is handassembled by the craftsmen and women at the Shizukuishi Watch Studio in northern Japan. The movement’s rigidity and accuracy ensure the highest possible levels of performance in the most demanding environments, both on land and under water.

A dial inspired by the majestic ice sheets of the Antarctic

Inspired by the Antarctic landscape, the dial is supremely legible.

The patterned dial captures the feeling of the Antarctic landscape while the subtle gradation of the blue from light to dark echoes the hauntingly beautiful colors of the polar ice. The bezel also evokes the uniqueness of this frozen landscape with its ice-blue numerals and markers. All twelve-hour markers have a generous coating of Lumibrite, as do the hands, and the crystal is a dual-curved sapphire with antireflective coating on the inner surface to ensure high legibility from every angle.
The strap’s design reflects that of the 1968 watch but it is made of silicone. The additional Seichu fabric strap offers a uniquely Japanese aesthetic and texture.


The design and texture of the watch strap pay homage to the 1968 original but it is now produced in silicone for greater strength and comfort. The watch is also offered with a fabric strap which incorporates a traditional braiding technique from Japan called Seichu. Of course, this Seichu strap’s strength and resistance to the degradation caused by exposure to sunlight meet the most demanding standards of Seiko Prospex diver’s watches.

The Prospex Save the Ocean series.

This new watch joins the Seiko Prospex Save the Ocean series in support of several different marine conservation initiatives, one of which involves contributions to the National Institute of Polar Research, which is based in Tokyo. As part of this program, Seiko recently donated watches to the 63rd Japanese Antarctic Research Expedition (JARE) team.

Akio Naito, President of Seiko Watch Corporation, presents the new Prospex SLA055J1  to Takanobu Sawagaki, one of the leaders of the 63rd JARE

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