Seiko
Prospex Turtle
SRP777
The modern Turtle reborn — a diver built on decades of deep-water heritage.
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Overview
The Seiko SRP777 is a sport diver within the Prospex collection, distinguished by its broad cushion-shaped case that revives the silhouette of Seiko's original 1970s "Turtle" reference. Measuring 44.3 mm in stainless steel, it pairs a bold black dial fitted with luminous markers to the reliable automatic calibre 4R36. The result is a tool watch that bridges Seiko's long diving legacy with an accessible, contemporary execution.
History
Seiko introduced the SRP777 in 2016 as part of a broader revival of the Turtle form factor, a design that had earned a devoted following since its debut in the 1970s. The cushion case profile — wider at the shoulders and tapered toward the lugs — had been absent from the catalogue for some years before its return under the Prospex banner. The SRP777 ran through the early 2020s, during which time it became one of the most widely discussed entry-level divers in online collector communities. Its production run concluded around 2022, by which point it had firmly established itself as a modern reference point for the Turtle lineage.
Notable points
- The distinctive cushion-shaped case directly references Seiko's iconic 1970s Turtle diver, giving the SRP777 an unmistakable vintage-influenced silhouette.
- Power is provided by the in-house Cal. 4R36, an automatic movement offering hand-winding and hacking capabilities — features not always present at this tier.
- The 44.3 mm stainless steel case wears larger than its dimensions suggest due to the wide cushion geometry, making it a prominent presence on the wrist.
- Applied luminous markers on the black dial ensure strong legibility in low-light and underwater conditions, consistent with the watch's diver specification.
- The SRP777 attracted a notably active collector following, spawning a wide aftermarket of replacement bezels and straps that allowed for extensive personalisation.
Specifications
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