# Seiko Prospex Save the Ocean Review by A.I. WatchMetrics

## Watch Summary
The Seiko Prospex Save the Ocean, exemplified by the Turtle SRPE27 Manta Ray edition, is a sporty dive watch with a distinctive cushion-shaped case and textured black dial mimicking a manta ray to promote ocean conservation, equipped with the workhorse automatic 4R36 movement offering 41 hours of power reserve, targeting eco-conscious adventurers and tool watch fans who prioritize durability and legibility over flash.

## Overall Watch Rating: 6.1/10.0

**Dials & Design Metric (8.2/10.0)** - The manta ray-inspired textured dial with bold Lumibrite indices delivers standout visual appeal and dive-ready legibility, on par with more premium Japanese tool watches like Grand Seiko divers.
**Versatility Metric (8.0/10.0)** - This robust 200m diver transitions seamlessly from underwater adventures to casual wear, matching the all-around utility of classics like the Omega Seamaster.
**Material Metric (7.8/10.0)** - Stainless steel construction with brushed finishing and Hardlex crystal provides solid tool-watch toughness, comparable to Sinn or Zodiac divers in everyday resilience.
**History & Innovation Metric (7.6/10.0)** - Seiko's storied dive heritage from the 1965 62MAS shines through, though the standard movement keeps it from elite innovation levels seen in Spring Drive models.
**Movement Metric (6.0/10.0)** - The 4R36 automatic offers reliable hacking, hand-winding, and -15/+25 sec/day accuracy, performing like typical ETA 2824 alternatives in mid-tier divers.
**Brand Metric (5.5/10.0)** - Seiko delivers consistent mid-tier reliability and value, akin to Hamilton or Citizen in the accessible enthusiast space.
**Functions Metric (4.5/10.0)** - Core timekeeping plus date and dive bezel suffice for daily use, but lack the breadth of multifunction GMTs like the Seiko 5 Sports.
**Complications Metric (4.0/10.0)** - The simple date window adds basic utility without venturing into the complexity of chronographs found in Tag Heuer Aquaracers.
**Rarity Metric (3.2/10.0)** - At around $500, it's a common production diver, far from the exclusivity of limited-run Doxa or Blancpain models.

## Total Performance Score (TPS): 9.9

## WM Collector Grade: A+

## Performance Insights: Excels in design, versatility, and materials for a capable tool watch, but rarity and complications drag it down; tremendous value well below the $500 price versus a $280 implied price.

## TPS Interpretation: Exceptional Value: The watch vastly overdelivers on practical dive performance and unique aesthetics relative to its affordable price point.

## Watch Data
[Picture URL] - https://www.seikowatches.com/content/dam/seiko-global/prospex/srpe27/srpe27_01.jpg; [backPicture] - https://www.seikowatches.com/content/dam/seiko-global/prospex/srpe27/srpe27_03.jpg; [lumePicture] - https://www.ablogtowatch.com/wp-content/uploads/2021/06/Seiko-Prospex-Turtle-SRPE27-Save-the-Ocean-Manta-Ray-Lume.jpg; [Nickname] - Turtle Save the Ocean Manta Ray; [Brand] - Seiko; [Model] - Prospex SRPE27; [Country] - Japan; [Product Link] - https://www.seikowatches.com/us-en/products/prospex/srpe27; [reviewLink] - https://www.ablogtowatch.com/seiko-prospex-save-the-ocean-manta-ray-turtle-srpe27-watch-review/; [Movement Type] - Automatic; [Movement Name] - 4R36; [# Secondary] - 0; [watchDescription] - Special edition Prospex diver with manta ray textured dial supporting Save the Ocean conservation, 200m water resistance, unidirectional bezel, and silicone strap.; [caseWidth] - 44.0; [lugToLugLength] - 48.5; [thickness] - 13.2; [lug] - 22; [waterResist] - 200; [powerReserve] - 41; [beatFrequency] - 21600; [lume] - Lumibrite; [jewels] - 24; [caseMaterial] - Stainless Steel; [watchGlass] - Hardlex; [Bezel] - Unidirectional rotating aluminum; [caseback] - Solid screw-down; [Crown] - Screw-down; [Strap] - Silicone; [Shape] - Cushion; [Dial] - Black manta ray texture; [Seconds] - yes; [Date] - yes; [Calendar] - no; [Chiming] - no; [Chronograph] - no; [Compass] - no; [dateCompilation] - no; [DigitalDisplay] - no; [Dress] - no; [Field] - no; [GMT] - no; [Mechanical Alarm] - no; [Moonphase] - no; [Tourbillon] - no; [worldTimer] - no; [powerReserveIndicator] - no; [Diver] - yes; [Pilot] - no; [racing] - no; [Skeleton] - no; [Vintage] - no; [StyleFormal] - no; [StyleCasual] - yes; [StyleSports] - yes; [StyleTravel] - no; [StyleAdventure] - yes; [StyleCollector] - yes; [StyleTool] - yes; [StyleStatement] - yes; [StyleVintage] - no; [StyleSmart] - no; [StyleCustom] - no; [TPS_new] - 9.9; [TPSgrade] - A+; [TPSimpliedPrice] - 280;

**A.I. WatchMetrics Review v37.4 Grok 4 Fast. December 19, 2025.**