Seiko’s legacy of testing the limits of the modern sports watch and supporting marine conservation continues through its partnership with the Japan Agency for Marine-Earth Science and Technology (JAMSTEC), which began in the 1980s. In 1983, two professional diver’s watches rated to 600 meters were successfully tested aboard the SHINKAI 2000, a manned research submersible operated by JAMSTEC. Inspired by the spirit of bold exploration that connects JAMSTEC and Seiko, a new limited-edition diver’s watch joins Prospex’s flagship Marinemaster series.
The dial’s new three-dimensional pattern takes inspiration from the tracks carved through sea ice by icebreaking vessels. Its blue gradient, which deepens toward the center, combines with a thick, transparent coating that is meticulously polished to create exceptional clarity and depth. Together, these elements evoke the pure, profound blue that emerges within the Arctic Ocean, revealed amidst the vast expanse of drifting sea ice. The design features a blue ceramic bezel that enhances the beauty of the dial while providing exceptional scratch resistance.
With Caliber 8L45, Seiko has improved the shape and design of the mainspring and implemented precise accuracy adjustments, achieving the highest accuracy (-5 to +10 seconds per day) among Seiko’s current mechanical movements and a power reserve of approximately 72 hours. The watch features an updated clasp that offers easy adjustments of up to 16 mm in 2 mm increments by sliding the button inside. Even when the clasp is closed, the extension can be retracted, ensuring comfortable and effortless operation.
Specifications:
- Case Dimensions: 42.6 mm diameter, 14.1 mm thickness, 49.3 mm length
- Case: stainless steel case, bezel: stainless steel with ceramic insert
- Crystal Material: dual-curved sapphire crystal with anti-reflective coating on the inner surface
- Dial: blue gradient
- Strap/Bracelet: stainless steel bracelet, three-fold clasp and push-button release, solid and slide adjuster
- Lug Width: 20mm
- Movement: Caliber 8L45, 35 jewels, power reserve: approximately 72 hours, automatic with manual winding
- Water Resistance: 300 meters (1000 feet), diver’s
- Limited Edition: 78 of 1,000
