Seiko Prospex SLA059 Maroon Seigaiha U.S. Special Edition

The Seiko Prospex SLA059 “Seigaiha” U.S. Special Edition is a high-end professional saturation diver distinguished by one of the most striking dials Seiko has produced for the American market. Released in 2021 exclusively for the U.S., the SLA059 features a rich burgundy-maroon dial decorated with the traditional Japanese Seigaiha, or “blue ocean waves,” pattern—a centuries-old motif associated with peace, good fortune, and the enduring power of the sea. Seiko describes the burgundy coloration as representing the ocean at daybreak as sunlight begins to penetrate the darkness. Its substantial 44.3mm one-piece stainless steel case receives Seiko’s Super-Hard coating and is paired with a black ceramic unidirectional bezel, sapphire crystal with internal anti-reflective coating, screw-down crown, and professional 300-meter water resistance suitable for saturation diving. The watch is fitted to a matching Super-Hard-coated stainless steel bracelet and was originally supplied with an additional black silicone dive strap and special collector’s presentation.

Inside is Seiko’s high-grade Caliber 8L35, a 26-jewel automatic movement developed specifically for professional dive watches and assembled in Japan. Operating at 28,800 vibrations per hour, the 8L35 offers both hacking and manual winding along with approximately 50 hours of power reserve, and its construction is engineered to deliver the additional torque and durability required of Seiko’s flagship mechanical divers. The SLA059’s combination of monobloc-style professional dive-watch construction, ceramic bezel, distinctive Seigaiha dial, and premium 8L35 movement places it firmly among Seiko’s higher-end Prospex offerings. As a U.S.-exclusive Special Edition with its unusual maroon wave-pattern dial, the SLA059 stands apart from standard-production Seiko divers and offers a distinctly Japanese design element rarely seen in the brand’s professional saturation-diving lineup.

Reference: SLA059

MSRP: $3,300

Dated: 2026

Bezel: Aligns - Ceramic

Dial: Maroon Seigaiha pattern

Bracelet: Seiko Stainless bracelet, and Seiko rubber strap

Case Size: 44.3mm x 15.4mm Thickness x 50mm Lug to Lug

Case Metal: Stainless Steel

Movement: 8L35 - Automatic

Functions: Hours, Minutes, Second, Date

Accessories: Inner/outer boxes, warranty card, and cuff links

Crystal: Sapphire

Bracelet size: 8”

The case has no wear. Bracelet has no wear, the rubber strap unworn. Bezel, crystal, dial and hands are in perfect shape.

Seiko's history began in 1881 when Kintaro Hattori opened a watch shop in Tokyo. In 1892, he established Seikosha, a factory for producing wall clocks. The company quickly progressed, creating Japan's first wristwatch, the Laurel, in 1913. Despite setbacks like the Great Kanto Earthquake of 1923, Seiko persevered, launching its first watch under the Seiko brand name in 1924.

The post-World War II era saw Seiko's rapid growth and innovation. They introduced Japan's first automatic wristwatch in 1956 and launched the prestigious Grand Seiko line in 1960. Seiko achieved international recognition for accuracy in 1968, winning a Geneva Observatory competition.

The company made a name for its divers in 1965 with the introduction of their first professional dive watch, the 62MAS. This was followed by the iconic 6159-7001 in 1968, which was water-resistant to 300 meters. Seiko gained international recognition in 1975 with the release of the 6159-7010, nicknamed the "Tuna Can" due to its distinctive case shape. In 1969, they revolutionized the industry with the Astron, the world's first quartz wristwatch, ushering a new era of watchmaking that would send waves across the industry through the 70s and 80s. From its humble beginnings to becoming a global watchmaking giant, Seiko's history is characterized by resilience, technological advancement, and a commitment to precision.