The Prospex SRPF79K1, is a "Save The Ocean" Special Edition, linking the timepiece directly to Seiko's marine conservation initiatives. Its defining feature is the graduated "Dark Manta" dial, which depicts the ocean's surface from below and features subtle Manta Ray silhouettes. This model is housed in the upgraded "King Samurai" case, which is distinguished by the inclusion of a scratch-resistant sapphire crystal and a durable ceramic bezel insert. Inside, the watch is powered by Seiko's in-house 4R35 automatic calibre, a reliable workhorse movement.
Established in 1881 by Kintarō Hattori, Seiko is defined by its principle of complete vertical integration, manufacturing every single component of its timepieces in-house. They were the primary catalyst of the "Quartz Crisis" with the commercial release of the 1969 Astron—the world’s first quartz watch—the brand simultaneously advanced mechanical horology, developing one of the first automatic chronographs and pioneering high-frequency movements to challenge Swiss standards.
Seiko's relentless innovation continues with proprietary technologies like Spring Drive, which blends mechanical power with quartz precision. This technical mastery underpins Seiko's legacy in creating archetypal and exceptionally durable tool watches, particularly in the domain of professional diving.
Overall Grade: 8 / 10 | Great Condition, Light Visible Wear Production: Undated Contents: Full-set Genre: Dive Watch
Size: 44mm Thickness: approx. 13mm Lug width: 22mm
Case: Stainless steel "Samurai" case, brushed and mirrored facets, light visible wear Bezel: Stainless steel, unidirectional bezel, ceramic dive insert, light visible wear Dial: Dark Blue textured "Manta Ray" dial, applied markers, date window with cyclops Hands: Arrow hand, lumed
Crown: Stainless steel screw-down crown, light visible wear Crystal: Hardlex mineral crystal, light visible wear Bracelet: Stainless steel bracelet, light visible wear Caseback: Stainless steel solid screw-down caseback, light visible wear Movement: Automatic Caliber: 4R35