Before Seiko became a household name in the world of serious dive watches, there was the 62MAS—the brand’s very first professional diver, released in 1965. With its utilitarian design, reliable movement, and 150-meter water resistance, it quickly became a favorite among Japanese explorers and marine professionals. Fast forward over half a century, and Seiko quietly brought that icon back to life in the form of the SLA017J1.
Released in 2017 as a limited edition of 2,000 pieces, the SLA017 is more than a tribute—it’s a lovingly re-engineered recreation of the original 62MAS, updated subtly for the modern wrist. The case design remains faithful to the 1965 silhouette, but the materials and finishing have been elevated significantly. It features a 39.9mm stainless steel case with Zaratsu-polished surfaces, a screw-down crown, and a domed sapphire crystal. It’s water-resistant to 200 meters, well beyond the original’s specs.
The dial stays true to the vintage layout, with bold rectangular markers, generous lume, and simple printed text. Even the bezel—now upgraded to a modern unidirectional design—retains its clean, tool-like aesthetic. It’s a watch built for function, with every detail feeling deliberate and honest.
Inside, the SLA017 is powered by Seiko’s Caliber 8L35, a high-grade automatic movement assembled by hand at the Shizukuishi Watch Studio—the same facility that builds Grand Seiko mechanicals. It beats at 4Hz, offers 50 hours of power reserve, and is known for its durability and smooth winding feel.
Worn on either a vintage-style rubber strap or a matching stainless steel bracelet, the SLA017 wears comfortably and with confidence, straddling the line between faithful homage and modern precision.
For collectors and enthusiasts alike, the SLA017 is more than a reissue. It’s a celebration of where Seiko’s dive watch legacy began, brought back with respect, restraint, and quiet technical excellence. A modern classic, born from the depths of one of the most important chapters in Japanese horology.
