Seiko Prospex Diver Turtle SRP777

The Seiko Prospex Turtle SRP777 is one of the most iconic modern dive watches ever produced, reviving the legendary cushion-shaped case that made the original 6309 "Turtle" a favorite among professional divers and military personnel throughout the 1970s and 1980s. Released in 2016 as part of Seiko's Prospex collection, the SRP777 stays remarkably faithful to its predecessor with a 45mm stainless steel case, black dial, black aluminum bezel, and signature 4 o'clock screw-down crown. Despite its larger dimensions, the watch wears exceptionally well thanks to its short lug-to-lug profile and curved case design. Certified to ISO standards with 200 meters of water resistance, the SRP777 is every bit the professional dive watch its heritage suggests, while Seiko's renowned Lumibrite ensures outstanding visibility in low-light conditions.

Powering the SRP777 is Seiko's trusted in-house Caliber 4R36 automatic movement, featuring hacking seconds, hand-winding capability, and a 41-hour power reserve. Protected by a durable Hardlex crystal and finished with the iconic Tsunami-engraved screw-down caseback, the watch is built for reliability in demanding environments. More than just a faithful reissue, the SRP777 has become a modern classic in its own right, praised for its unbeatable combination of heritage, comfort, and value. Whether purchased as a first mechanical dive watch or added to a seasoned collection, the SRP777 represents everything enthusiasts love about Seiko: dependable engineering, unmistakable design, and a legacy of producing some of the finest dive watches in the world.

Reference: SRP777

Bracelet: Black Watches of Espionage strap

Case: 44mm x 47.5mm lug to lug - Stainless Steel

Lug Width: 22mm

Movement: 4R36 - Automatic

Functions: Hours, Minutes, Seconds, Date-Day

Box and Papers: No box or papers - watch only

Crystal: Hardlex

Bracelet size: 7.75”

Case has minimal light wear. Strap has no wear. Dial, hands, and crystal have no wear.

Seiko's history began in 1881 when Kintaro Hattori opened a watch shop in Tokyo. In 1892, he established Seikosha, a factory for producing wall clocks. The company quickly progressed, creating Japan's first wristwatch, the Laurel, in 1913. Despite setbacks like the Great Kanto Earthquake of 1923, Seiko persevered, launching its first watch under the Seiko brand name in 1924.

The post-World War II era saw Seiko's rapid growth and innovation. They introduced Japan's first automatic wristwatch in 1956 and launched the prestigious Grand Seiko line in 1960. Seiko achieved international recognition for accuracy in 1968, winning a Geneva Observatory competition. 

The company made a name for its divers in 1965 with the introduction of their first professional dive watch, the 62MAS. This was followed by the iconic 6159-7001 in 1968, which was water-resistant to 300 meters. Seiko gained international recognition in 1975 with the release of the 6159-7010, nicknamed the "Tuna Can" due to its distinctive case shape. In 1969, they revolutionized the industry with the Astron, the world's first quartz wristwatch, ushering a new era of watchmaking that would send waves across the industry through the 70s and 80s. From its humble beginnings to becoming a global watchmaking giant, Seiko's history is characterized by resilience, technological advancement, and a commitment to precision.