Seiko Prospex SPB317 'Slim Turtle'

Prospex Automatic Diver’s Watch. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. Part of a rich legacy of innovation in high-intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with re-creations and re-interpretations of landmark achievements. With the thinnest case to date of any Seiko automatic diver’s watch, in stainless steel with super hard coating, this sleekly updated timepiece incorporates the distinctive cushion-shape and recessed crown of one of Seiko’s most iconic designs. Sporty and tailored, this versatile watch includes a curved sapphire crystal with anti-reflective coating on the inner surface, black uni-directional rotating elapsed timing bezel, and screwdown crown and caseback, as well as a black rail-pattern reinforced silicone strap inspired by the original model. The rich black dial features a date calendar and LumiBrite hands and markers. Created for scuba diving to depths of 200 meters, this exceptional timepiece offers manual winding capability and includes a 24-jewel automatic movement with a frequency of 21,600 vibrations per hour and a power reserve of approximately 70 hours.

Reference: SPB317

Dated: Open

Bezel Aligns

Bracelet: Silicon Strap

Case Size: 41mm x 12.3mm Thickness

Lug Width: 20mm

Case Metal: Stainless Steel

Movement: 6R35 - Automatic

Functions: Hours, Minutes, Seconds, Date

Box and Papers: Box and Papers

Crystal: Sapphire

Bracelet size: 7.75”

Case has little to no wear. Strap has no wear. Dial, hands, and crystal have no wear.

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.