Few partnerships in the watch world feel as natural as the one between Seiko and PADI. Since 2016, the Japanese watchmaker and the world’s largest scuba diving organization have collaborated on a series of dive watches that celebrate a shared commitment to ocean exploration.
For 2026, the partnership reaches two significant milestones: PADI’s 60th anniversary and ten years of collaboration with Seiko. To mark the occasion, Seiko has unveiled three special-edition Prospex models inspired by the underwater world that both organizations seek to protect and explore.
The collection spans three distinct corners of the Prospex lineup. Leading the release is the Prospex Marinemaster Professional SLA091, a serious saturation-diving instrument powered by Seiko’s high-end Caliber 8L45 automatic movement.
The watch features a striking gradient blue dial designed to evoke sunlight penetrating ocean depths, while its monobloc titanium case and 600-meter water resistance reinforce its professional credentials. The wave pattern integrated into the dial creates a sense of movement without compromising legibility, a balance Seiko has refined over decades of dive-watch development.
Joining it is the Prospex 1968 Heritage Diver’s GMT SPB509, which pairs a familiar Seiko dive-watch silhouette with practical travel functionality. Powered by the Caliber 6R54 automatic GMT movement, the watch allows wearers to track a second time zone while retaining the robust specifications expected from a modern Prospex diver. The blue-and-white color palette draws inspiration from tropical waters and echoes PADI’s signature branding without becoming overly literal.
The third model, the Prospex 1965 Heritage Diver’s SPB511, offers the most accessible entry point into the anniversary collection. Based on Seiko’s interpretation of its landmark 1965 diver, the watch utilizes the Caliber 6R55 movement and features a clean, ocean-inspired dial accented by subtle wave motifs. Like its siblings, the design focuses on functionality first, allowing the commemorative elements to enhance rather than overwhelm the watch’s purpose.
What makes these releases particularly successful is their restraint. Anniversary watches often lean heavily into logos and celebratory graphics, but Seiko instead uses texture, color, and material choices to tell the story. The result is a trio of dive watches that feel connected to the ocean rather than merely decorated for it.
As mechanical dive watches continue to evolve beyond their original professional purpose, the Seiko-PADI partnership remains rooted in authenticity. These anniversary editions serve as a reminder that the strongest collaborations are often those built on genuine shared interests rather than marketing convenience.
