The Seiko Prospex SRPD11 is a "Save the Ocean" Special Edition dive watch utilizing the brand's iconic cushion-shaped "Turtle" case, a design tracing back to the 1976 reference 6306. Official brand specifications dictate a 45mm stainless steel case and bracelet with a black hard coating, powered by the automatic caliber 4R36 movement.
Its defining visual feature is a textured, gradient blue dial patterned to resemble ocean waves and the ventral pleats of a whale. Key selling points include its robust 200-meter water resistance, reliable LumiBrite illumination, and durable Hardlex crystal.
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, Medium Wear Production: 2022 Contents: Box and Papers Genre: Dive Watch
Size: 45mm Thickness: 13.4mm Lug Width: 22mm
Case: Steel, black hard-coated, brushed sides, mirrored bevels, medium wear Bezel: Steel, unidirectional, blue-black insert, medium wear Dial: Blue gradient dial, wave pattern, applied markers, lumed Hands: Arrow and sword shaped, lumed
Crown: Steel, black hard-coated, screw-down, medium wear Crystal: Hardlex crystal, medium wear Bracelet: Steel, black hard-coated bracelet, medium wear Caseback: Steel, solid, screw-down, medium wear Movement: Automatic Caliber: 4R36