Seiko Prospex is a comprehensive sports watch series equipped with full-scale functions designed for use in sports and outdoor activities. Since releasing the first Japanese-made diver's watch in 1965, Seiko has continued to develop watches that can withstand extreme conditions. This history also overlaps with the background of producing professional measuring instruments such as railway watches and official timekeeping for international sporting events. This time, we will introduce the current Seiko Prospex models, along with their types, features, and uses.
A limited edition model released in 2025 to commemorate the 60th anniversary of Seiko's diver's watch. (Left) Automatic movement (Cal. 6R55). 24 jewels. 21,600 vph. Power reserve of approximately 72 hours. Stainless steel case (40mm diameter, 13mm thick). Water resistant to 300m. Limited to 6000 units worldwide (2000 units in Japan). 192,500 yen (tax included). Scheduled for release on Saturday, May 10, 2025. (Right) Automatic movement (Cal. 6R54). 24 jewels. 21,600 vph. Power reserve of approximately 72 hours. Stainless steel case (42mm diameter, 13.3mm thick). Water resistant to 300m. Limited to 6000 units worldwide (2000 units in Japan). 247,500 yen (tax included). Scheduled for release on Friday, June 6, 2025.
What is Seiko Prospex?
Seiko Prospex is a series of sports and adventure watches designed for active use in activities like diving, mountain climbing, and running. To meet the demands of professionals, the company offers models with high durability, water resistance, and legibility. Beginning with the first domestically produced diver's watch released in 1965, Seiko continues to develop watches that can withstand extreme environments.
The Seiko Prospex Concept
The basic concept of the Seiko Prospex is "a watch for challengers." It is not just a tool for displaying time, but is designed as a device that supports the activities of professionals, based on Seiko's brand philosophy.
For example, Seiko offers models that are water resistant to Seiko's own stringent diver's watch standards, which are trusted by professional divers, as well as models that pursue excellent visibility, readability, and measurement functionality as the ultimate practical watches born from Seiko's timekeeping technology and design philosophy.
The history and development background of Seiko's "dedicated watches"
Seiko has a history of developing watches not simply as decorative pieces, but as "dedicated machines" suited to specific environments and uses. A prime example of this is the first Japanese-made diver's watch, released in 1965. At the time, most watches used by professional divers were made by overseas manufacturers, but a letter received by Seiko led the company to develop a uniquely designed model suited to the physique and diving environment of Japanese people, setting a new standard in the industry.
Since then, the company has produced numerous specialized watches for situations requiring precision and durability, such as railway watches and official timekeeping for international sporting events. The experience of being the official timekeeper for international sporting events in particular was a major catalyst for Seiko to make its technological capabilities known to the world. This history is also utilized in the development of Seiko Prospex.
What is the unique "Extremely Exclusive Watch Exhibition"?
Seiko recently held an exhibition called "Extremely Exclusive Watches." This event is part of the "Power Design Project," a concept that proposes new possibilities for Seiko design, and is unique in that designers from this project propose new "exclusive watches." The second exhibition will be held from December 20, 2024 to February 16, 2025, and will feature exhibits such as "Watches for Vampires" and "Watches for Boiled Egg Lovers."
Along with this unique exhibit, the venue also featured a wide variety of specialized watches that the company has developed over the years, which became a hot topic among watch enthusiasts. The exhibits featured models specialized for various purposes, such as railway watches, aviation instruments, and special diver's watches for deep-sea exploration.
At the press conference for this event, Seiko's development team stated, "Seiko has a long history and accumulated technology in the development of specialized watches." The Seiko Prospex series is indeed a continuation of this lineage of specialized watch development. The idea of creating watches suited to specific environments and uses remains unchanged to this day.
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Current Seiko Prospex Watches
Seiko Prospex offers a diverse lineup of watches for a variety of activities, including diving, trekking, and sports. Each model is optimized for a specific purpose and features excellent designs such as water resistance, shock resistance, and visibility. Here we will introduce some of the most representative models in the current Seiko Prospex series.
"Marine Master": A professional diver's watch
The Marine Master is a full-fledged diver's watch designed for professionals. The Marine Master Professional in particular has been developed for use in extreme environments, with models available for saturation diving at depths of over 1000m.
The Marinemaster Professional features Seiko's unique monocoque case structure. By integrating the case and back cover, it achieves high water resistance and is unaffected by helium gas. Although it is a professional-grade watch, it is available in both mechanical and quartz models, allowing you to choose the model that best suits your needs and preferences.
The origin of this saturation diving model is the Seiko Professional Diver 600m, which was released in 1975. At the time, it attracted attention as the world's first diver's watch to feature a titanium case. It continues to evolve today, inheriting that technology. Automatic winding (Cal. 8L45). 35 jewels. 28,800 vph. Power reserve of approximately 72 hours. Ti case (diameter 45.4mm, thickness 16.0mm). Water resistant to 600m saturation diving. Limited to 600 pieces worldwide. Price: 715,000 yen (tax included).
"Diver Scuba": A genuine diver's watch that can be used in everyday life
The "Diver Scuba" is a full-fledged diver's watch suitable for everyday use. It is water resistant to 200m and boasts high durability that meets Seiko's strict diver's watch standards. Compared to the professional-grade "Marinemaster Professional," the case size is more compact, making it suitable for a wider range of uses.
The greatest appeal of this series is its versatility, as it follows the traditional design of Seiko divers' watches while also matching casual attire. Furthermore, models equipped with the mechanical movement, Cal. 6R54, boast a power reserve of approximately 72 hours, making them highly practical.
Seiko Divers' history began with the first domestically produced diver's watch in 1965, and the "Diver Scuba," which continues to inherit that DNA, continues to be supported by many fans. Automatic movement (Cal. 6R54). 24 jewels. 21,600 vph. Power reserve of approximately 72 hours. Stainless steel case (42mm diameter, 13.3mm thick). Water resistant to 300m for air diving. Limited to 6000 pieces worldwide. Price: 247,500 yen (tax included).
"Speedtimer": A model that inherits Seiko's chronograph technology
The "Speed Timer" series brings together Seiko's chronograph technology. As the name suggests, it is equipped with functions for timing, and is intended for use in motorsports, track and field events, and other events.
The roots of this series date back to the 1969 Seiko 5 Sports Speed Timer, which was released in 1969. It attracted a great deal of attention at the time for being equipped with the world's first automatic chronograph movement, Cal. 6139, which featured a vertical clutch mechanism. This tradition continues in the current Speed Timer series.
The current lineup includes a mechanical model equipped with a mechanical chronograph movement, the Cal. 8R series, and a model with a solar movement. Both have highly accurate measurement functions and are designed to be useful not only in sports but also in business situations. Automatic winding (Cal. 8R48). 34 jewels. 28,800 vph. Power reserve of approximately 45 hours. Stainless steel case (diameter 42mm, thickness 14.6mm). Water resistant to 10 bar. Price: 352,000 yen (tax included).
"Alpinist": History and Features as a Mountain Watch
The Alpinist series was developed for mountaineers, offering excellent durability and visibility. The series' history dates back to the 1959 Laurel Alpinist, which was designed for use in mountainous areas.
The current model is a mechanical model that follows the traditional Alpinist design. It features a distinctive inner bezel and a rotating ring for simple compass measurement. It is also water resistant to 20 bar, making it suitable for use not only outdoors but also in tough environments.
The Alpinist, which combines the practicality of a mountaineering watch with a classic design, is popular not only with outdoor enthusiasts but also with many watch fans. Automatic movement (Cal. 6R54). 24 jewels. 21,600 vph. Stainless steel case (39.5mm diameter, 13.6mm thick). Water resistant to 20 bar. Price: 149,600 yen (tax included).
"Super Runner Solar": A high-precision watch for runners
The Super Runner Solar is a model specifically designed for running and marathon competitions, featuring a lightweight and compact design. Equipped with a solar charging function, it can be used for long periods of time, so there is no need to worry about running out of battery during a competition.
This series is equipped with a lap time measurement function and a stopwatch function, allowing for accurate time management during training and races. It uses a digital display that emphasizes visibility and is designed to make the time easy to see even during the day.
For runners, the lightness and fit of a watch are important. The Super Runner Solar is designed for a stress-free fit and is comfortable even when worn for long periods of time. This model is suitable for a wide range of people, from competitive runners to recreational runners. Solar (Cal. S690). Plastic case (diameter 43.7mm, thickness 8.5mm). Water resistant to 10 bar. Price: 18,150 yen (tax included).
Buy a Seiko Prospex that suits your needs!
Seiko Prospex is a series that offers models specialized for various uses, such as diving, mountain climbing, running, fieldwork, etc. There is a wide range of options to choose from, from the professional-grade "Marine Master" to the easy-to-use "Diver Scuba" for everyday use, and the "Super Runner Solar" for runners.
A watch is not just an accessory, but a tool that requires optimal performance depending on the application. For example, the Marinemaster Professional, which is suitable for saturation diving, is suitable for serious diving, while the Alpinist or Landmaster, equipped with altitude and compass functions, is suitable for mountain climbing. By choosing a model that suits your lifestyle and activities, you can truly make the most of Seiko Prospex. Seiko's philosophy and technology, which have produced many "special-purpose watches," have been passed down to Prospex. If you are looking for a professional watch that combines functional beauty and durability, Seiko Prospex is the obvious choice.
