# Seiko Prospex Speedtimer Quartz Solar Review by A.I. WatchMetrics

## Watch Summary
The Seiko Prospex Speedtimer Quartz Solar is a robust sports chronograph reviving the 1969 Speedtimer racer aesthetic with a 42.1mm stainless steel case, fixed tachymeter bezel, textured black dial, and three subdials for 1/20th-second timing precision, targeting budget-conscious enthusiasts and active adventurers who want maintenance-free performance powered by the solar quartz Caliber V192 offering approximately 6 months of power reserve in the dark.

## Overall Watch Rating: 7.4/10.0

**Dials & Design Metric (8.8/10.0)** - The embossed vertical dial texture, bold lume indices, and integrated tachymeter evoke vintage racing charm with superior legibility, on par with Oris chronographs.
**Material Metric (8.5/10.0)** - Stainless steel construction with sapphire crystal and mixed brushing/polishing provides durable everyday toughness comparable to Tudor's Black Bay series.
**Versatility Metric (8.5/10.0)** - With 100m water resistance, bracelet/strap compatibility, and sporty yet refined looks, it transitions seamlessly from office to weekend activities like a Christopher Ward C60.
**History & Innovation Metric (8.4/10.0)** - Reviving the pioneering 1969 automatic chronograph with advanced solar quartz tech honors Seiko's legacy similarly to Citizen's Eco-Drive evolutions.
**Movement Metric (8.2/10.0)** - The V192 solar quartz delivers exceptional accuracy, perpetual light-charged reliability, and smooth 1/20th-second chronograph operation akin to Longines quartz Conquest models.
**Functions Metric (8.0/10.0)** - Core timekeeping plus full chronograph, date, and charge indicator offer practical utility matching mid-tier TAG Heuer Formulas.
**Complications Metric (7.8/10.0)** - The tri-compax chronograph layout with flyback-style reset provides engaging timing functions on the level of Sinn's entry quartz chronos.
**Brand Metric (5.1/10.0)** - Seiko's mid-tier reliability and enthusiast appeal align with Hamilton's accessible tool watch reputation.
**Rarity Metric (3.7/10.0)** - At its accessible price point and higher production volumes, it lacks the scarcity of limited-run microbrands like Halios.

## Total Performance Score (TPS): 9.9

## WM Collector Grade: A+

## Performance Insights: Excels in dials, materials, versatility, and movement for a compelling package, offset only by modest rarity, delivering superior value against an implied price of $1,850.

## TPS Interpretation: Outstanding Value: The watch punches far above its weight with innovative solar chronograph functionality and timeless design at a mid-tier price.

## Watch Data
[Picture URL] - https://www.seikowatches.com/dw/image/v2/BFND_PRD/on/demandware.static/-/Sites-seiko_us-Library/default/dw123a4e04/SSC813/SSC813_side1.jpg; [backPicture] - https://www.seikowatches.com/dw/image/v2/BFND_PRD/on/demandware.static/-/Sites-seiko_us-Library/default/dw123a4e04/SSC813/SSC813_side2.jpg; [lumePicture] - N/A; [Nickname] - Speedtimer Solar; [Brand] - Seiko; [Model] - Prospex Speedtimer Quartz Solar Chronograph SSC813; [Country] - Japan; [Product Link] - https://www.seikowatches.com/us-en/prospex-speedtimer-SSC813; [reviewLink] - https://www.ablogtowatch.com/seiko-prospex-speedtimer-solar-chronograph-ssc813-ssc815-ssc817-watch-review/; [Movement Type] - Quartz Solar; [Movement Name] - Caliber V192; [# Secondary] - 3; [watchDescription] - Revival chronograph with solar power, tachymeter scale, and 1/20th-second measurement in Prospex sports style; [caseWidth] - 42.1; [lugToLugLength] - 49.2; [thickness] - 13.7; [lug] - 22; [waterResist] - 100; [powerReserve] - 6 months; [beatFrequency] - N/A; [lume] - Lumibrite; [jewels] - 0; [caseMaterial] - Stainless steel; [watchGlass] - Sapphire; [Bezel] - Fixed black aluminum tachymeter; [caseback] - Screw-down see-through; [Crown] - Screw-down; [Strap] - Stainless steel bracelet; [Shape] - Round; [Dial] - Black embossed; [Seconds] - Subdial; [Date] - Yes; [Calendar] - No; [Chiming] - No; [Chronograph] - Yes; [Compass] - No; [dateCompilation] - No; [DigitalDisplay] - No; [Dress] - No; [Field] - No; [GMT] - No; [Mechanical Alarm] - No; [Moonphase] - No; [Tourbillon] - No; [worldTimer] - No; [powerReserveIndicator] - Yes; [Diver] - No; [Pilot] - No; [racing] - Yes; [Skeleton] - No; [Vintage] - No; [StyleFormal] - No; [StyleCasual] - Yes; [StyleSports] - Yes; [StyleTravel] - No; [StyleAdventure] - Yes; [StyleCollector] - Yes; [StyleTool] - Yes; [StyleStatement] - No; [StyleVintage] - No; [StyleSmart] - No; [StyleCustom] - No; [TPS_new] - 9.9; [TPSgrade] - A+; [TPSimpliedPrice] - 1850;

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