The SRPB99K1 is part of Seiko's official partnership with PADI (Professional Association of Diving Instructors). Its design is defined by the angular, faceted lugs of the "Samurai" case, which is paired with the classic "Pepsi" dive bezel. This model features a distinct black "wave" pattern dial and is powered by the in-house calibre 4R35, a reliable automatic movement with a 41-hour power reserve.
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: 2020 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, "Pepsi" aluminum dive insert, light visible wear Dial: Black "PADI" wave-pattern dial, applied markers, date window 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