Introducing the Seiko Prospex “Save the Ocean” SLA055 and SLA057

If swimming history focuses on Seiko is well known so far and launched by the well-known 62MAS of 1965, there is another important watch – if not the most important one in the nation – that has been a major influence on archeological and modern collections; 1968 Seiko Automatic Diver 300m Hi-Beat 6159-7001. These dive guard they were made for professionals and travelers, and were designed to meet the challenges of which they are extremely complex. Based on this concept, the brand is now launching the Seiko Prospex 1968 Diver’s “Save the Ocean” SLA055 and SLA057, two watches that can benefit from marine storage systems and are worn by members of the 63rd Japan Antarctic Research Expedition’s mission in Antarctica.


The 1965 Seiko 62MAS is considered to be the most important because it belonged to Seiko, as well as Japan’s first ground clock. The 150-meter-long watch proves to be the best and most reliable one worn by members of the 8th Japanese Antarctic Research Expedition in 1966. It was also the start of a larger line of watches designed for underwater use. The successor of the clock, though often deposed in a second place (not just in time) may be the most important, this time in terms of its description and design.

First, 1968 Seiko Automatic Diver 300m hi-beat ref. 6159-7001

The Seiko Automatic Diver 300m Hi-Beat 6159-7001 was manufactured in the second half of the 1960s and was introduced in 1968. The watch was not the only one of its predecessors. In just three years, Seiko had doubled her water supply, improved her workmanship, and achieved better. The Automatic Diver 300m was the first hi-beat diver on the market. But it is the same design that has made history, because this watch sounds like a well-known… and a clock that will describe 50 years of Seiko’s clocks.

The 6159-7001 (with 6215-7000, the same-looking clock with the same shape but not fixed) was larger (44m), larger (14mm thick), more secure than the previous set (with monobloc case). ). It had large shoulders with large polished sides, a high-rise bezel and a crown at 4 o’clock, all connected by Seiko’s swimsuits.

If it had been the most inspiring of many Seiko watches in the past, the design of the watch has been repeated several times recently. It goes to accessible nations, e.g. and SPB077 & SPB079 and The new SPB185 & SPB187. The same anointing has been used in intermediate types, such as SLA019. And finally, we have seen faithful creatures and Images of Hi-Beat SLA025 (historical parallel) and Images of Hi-Beat SLA039 (very modern imitation and blue singing).

The new SLA055 is SLA057

There are four things to know in the name of this watch (sorry in advance…), the modern version of Seiko Prospex 1968 Diver Save the Ocean Limited Edition SLA055 and SLA057. First of all, here are the 1968 Diver’s clocks, which are supposed to give you a clear idea of ​​what led to their production. Second, these are “Modern Interpretations” meaning that we are not talking about “Re-Creation” models as in the case of SLA025 or SLA039. This means that watches are made of history but not based on one color, which leads Seiko to action, production or quantity.

Modern Translation of Seiko Prospex 1968 Diver Save the Ocean Limited SLA055 SLA057

Third, the clocks are derived from the “SLA” category, a term used to refer to Seiko’s most advanced watches, with high-quality equipment and precision. Finally, the clocks are part of the “Save the Ocean” team, which aims to support a number of maritime protection strategies – as in the case of this trilogy of examples or This duo.

Both of the clocks we see today are similar in all directions, except for their colors. As mentioned, this was inspired by the 1968 Hi-Beat Diver, which looks good on all aspects of the case. Angular as well as muscular, we also find the same shape with pointed shoulders with a sharpened part, a raised bezel and a crown at 4 o’clock. But, some things have changed, including quantity. Notably, these SLA055 and SLA057 watches are slightly more compact than the old or modified model, with 42.6mm inches and 13.1mm length – that is 2.2mm in diameter and 2.6mm in length. And on hand, this is not to be overlooked!

Modern Version of Seiko Prospex 1968 Diver's Save the Ocean Limited Edition SLA057

In order to achieve this reduction in size, other permits were created, such as water resistance reduced to a minimum of 200 meters. But note that a new crown is made, which is not made directly in the case but closed in another part that is made in the case and can be easily modified. Likewise, the unidirectional bezel, although it comes out very often in the case, is smaller and has a new profitable record. It also has a ceramic stand with a 60-minute scale. The metal case is curved and the clock is protected by double sapphire sapphire with AR coatings.

Modern Version of Seiko Prospex 1968 Diver's Save the Ocean Limited Edition SLA057

Similarly, weapons have been updated on the Prospex 1968 Diver for “Save the Ocean” SLA055 and SLA057. The case, the bezel and the crown are all made of Seiko’s Ever-Brilliant Steel, a special anti-corrosion steel more commonly used in watches today (similar to the 904L steel). In addition, the case is best completed with a polished (non-abrasive) Zaratsu, which makes the watch extremely satisfying.

Modern Version of Seiko Prospex 1968 Diver's Save the Ocean Limited Edition SLA055

As mentioned, Seiko is releasing watches today, all the same except for their colors. The most striking of these two is the SLA057, which has a black dial with gold-plated indexes and hands, all filled with Lumibrite. The scale on the bezel also has a warm, golden color and the singing does not reflect its shape. For this reason, it is close to the original concept of 1968 and makes for a very interesting, high-quality watch.

The second version, SLA055, is a more sophisticated and modern version. It has a clear melody, ranging from light to dark blue, with an icy texture. His idea was to redefine the Antarctic landscape and the glaciers. Bezel also follows with blue ice numbers and markers. Here, the hands and pens are silver and full of Lumibrite cream. Of all the colors, the show is the classic one with hours, minutes and seconds, and a 4:30 day window.

Enabling this watch is a very advanced process, but not the most recent Hi-Beat model used in SLA025 or SLA039. Seiko here went to Caliber 8L35, a group made specifically for swimming watches and assembled manually at Shizukuishi Watch Studio in northern Japan – meaning the same place where Grand Seiko tracks are made. Basically, the same move comes from the Grand Seiko caliber 9S55 (now replaced by 9S65, with more power). This motion travels at 4Hz and can store up to 50 hours of electrical protection. It is also known to flow within chronometric measurements.

The Seiko Prospex 1968 Diver’s “Save the Ocean” SLA055 and SLA057 are supplied with two cables. The first is a black swimsuit with a shape that pays homage to the 1968 model, yet it is now made of silicone for durability and comfort. This cord is closed with a metal pin. The watches are also supplied with a woolen belt that incorporates a traditional Japanese weaving technique called Seichu. SLA055 comes with a blue belt while SLA057 comes with an extra black belt.

As part of the Seiko Save the Ocean program, the watches have donated to the National Institute of Polar Research, based in Tokyo. In addition, Seiko recently donated watches to wear to members of the 63rd Japanese Antarctic Research Expedition’s mission in Antarctica.

Availability & Price

Varieties of Seiko Prospex 1968 Diver’s Modern Re-interpretation Save the Ocean Limited Edition will be available from Seiko Boutiques and selected retailers worldwide in January 2022. The blue SLA055 has 1,300 pieces and the black SLA057 has only 600 pieces. They will all sell EUR 4,600.

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