Celebrating Seiko’s 145th anniversary,
Prospex introduces two limited-edition models distinguished
by bezels featuring a striking blue color.

In 1881, Kintaro Hattori opened a shop known as “K. Hattori” in Tokyo’s Ginza district, beginning what would evolve into today’s Seiko. Guided by a philosophy to be “Always one step ahead of the rest,” he went on to produce Japan’s first wristwatch in 1913.

Building on its founding spirit, Seiko experienced a period of rapid transformation and innovation in the 1960s. During this decade, the company introduced numerous breakthroughs, including Japan’s first chronograph wristwatch in 1964, its first diver’s watch in 1965, and the world’s first quartz wristwatch in 1969. The decade also saw the introduction of Seiko Blue, a signature color, refined over time and reflecting Seiko’s pioneering spirit.

Today, Seiko Prospex introduces two new limited-edition models, each showcasing a distinct design while sharing blue as a unifying accent that pays tribute to Seiko Blue.

1965 Heritage Diver’s design featuring a distinctive color echoing Seiko Blue

The limited-edition model powered by Caliber 6R55 is based on the original 1965 diver’s watch. In the years since creating Japan’s first diver’s watch, Seiko has produced numerous diver’s watches trusted by professionals and sports enthusiasts around the world for their safety, reliability, and ease of use. Inheriting the legacy of Seiko’s original diver’s watch, this creation features a timeless, purpose-driven design combined with high functionality, including 300 meters of water resistance for air diving and a power reserve of approximately 72 hours. This creation pairs a refreshing silver-white dial with blue accents in the form of the aluminum bezel insert and the seconds hand.

The watch’s bracelet features a clasp that allows for a 15mm adjustment range, easily extended or shortened in six 2.5mm increments by pressing the side buttons. This ensures a comfortable fit, adapting to changes in wrist size caused by diving pressure or the weather.

A second model featuring a sculpted design and a two-tone bezel

The limited-edition model powered by Caliber 4R35 is distinguished by its bold case shape and sharply defined design. The lugs feature decisive faceting as if sculpted by a sword. By emphasizing flat planes, the design achieves a crisp, dynamic appearance. This sharp aesthetic carries through to the bracelet links, while the hands and indexes are unified in a sharp design, resulting in a diver’s watch with a commanding presence. The watch features a two-tone aluminum bezel insert, rendered in silver tone for the 0-to-15-minute scale and blue for the remainder, serving as a distinctive design accent.

The two limited-edition creations will be available from June 2026 at the Seiko boutiques and select retailers worldwide.

Seiko 145th Anniversary
Seiko Prospex 1965 Heritage Diver’s Watch Limited Edition: HBC005

Caliber 6R55

Specifications

Seiko 145th Anniversary
Seiko Prospex Limited Edition: HBB001

Caliber 4R35

Specifications