# Seiko Prospex Speedtimer Automatic Review by A.I. WatchMetrics

## Watch Summary
The Seiko Prospex Speedtimer Automatic is a sporty chronograph that reinterprets the brand's pioneering 1969 Speedtimer—the first automatic chronograph produced in Japan—with a 42.5mm stainless steel case housing the in-house 6R55 automatic movement and its impressive 72-hour power reserve, a striking silver reverse-panda dial with tachymeter scale, 100m water resistance, and versatile motorsport styling targeted at budget-conscious enthusiasts seeking heritage mechanical performance.

## Overall Watch Rating: 7.7/10.0

**Dials & Design Metric (9.1/10.0)** - The silver reverse-panda dial with bold applied indices, printed tachymeter chapter ring, and symmetrical subdial layout delivers vintage chronograph charisma on par with entry-luxury icons like the Longines Spirit Zulu Time.
**Material Metric (9.0/10.0)** - Brushed and Zaratsu-polished stainless steel paired with a hardened box-shaped sapphire crystal offers robust, premium-grade construction comparable to Sinn's tool watches.
**Movement Metric (8.7/10.0)** - The 6R55 automatic caliber impresses with 72-hour reserve, hand-winding, hacking, and reliable chronograph actuation, benchmarking against ETA 7750-powered chronos in Hamiltons.
**Versatility Metric (8.6/10.0)** - This chronograph transitions seamlessly from casual weekend drives to office wear, matching the all-occasion flexibility of a Tudor Black Bay Chrono.
**History & Innovation Metric (8.1/10.0)** - Rooted in Seiko's landmark 1969 auto-chrono debut and powered by an evolved in-house module, it holds cultural weight akin to Citizen's Tsuyosa reissues.
**Complications Metric (8.0/10.0)** - The flyback-capable chronograph with 60-minute and 24-hour subdials provides practical timing utility similar to mid-tier Valjoux-powered pieces.
**Functions Metric (7.3/10.0)** - Core timekeeping plus date and full chronograph functionality covers everyday needs effectively, like a standard Oris pointer-date.
**Brand Metric (5.3/10.0)** - Seiko's Prospex delivers consistent mid-tier reliability and enthusiast appeal, on level with Christopher Ward's accessible tool watches.
**Rarity Metric (5.0/10.0)** - Moderately produced at around $1,700 MSRP, it offers exclusivity between mass Seikos and limited TAG Heuers.

## Total Performance Score (TPS): 4.6

## WM Collector Grade: B+

## Performance Insights: Excels in dials, materials, movement, and versatility while brand and rarity lag, providing outstanding value versus its $9,500 implied price.
## TPS Interpretation: Solid Value: The watch punches well above its weight in chronograph execution and heritage styling for everyday affordability.

## Watch Data
[Picture URL] - https://www.seikowatches.com/us-en/prospex/speedtimer/srq031j1/images/01_SRQ031J1_Front.jpg; [backPicture] - https://www.seikowatches.com/us-en/prospex/speedtimer/srq031j1/images/02_SRQ031J1_Back.jpg; [lumePicture] - ; [Nickname] - Speedtimer 1969; [Brand] - Seiko; [Model] - Prospex Speedtimer Automatic Chronograph; [Country] - Japan; [Product Link] - https://www.seikowatches.com/us-en/prospex/speedtimer/srq031j1; [reviewLink] - https://www.hodinkee.com/articles/hands-on-seiko-prospex-speedtimer-chronograph-1969-reinterpretation-srq031-srq033; [Movement Type] - Automatic; [Movement Name] - 6R55; [# Secondary] - 3; [watchDescription] - Faithful 1969 re-interpretation with silver reverse-panda dial, tachymeter scale, and modern specs including 72h power reserve; [caseWidth] - 42.5; [lugToLugLength] - 49.4; [thickness] - 13.6; [lug] - 22; [waterResist] - 100; [powerReserve] - 72; [beatFrequency] - 21600; [lume] - Lumibrite; [jewels] - 24; [caseMaterial] - Stainless steel; [watchGlass] - Box-shaped sapphire; [Bezel] - Fixed tachymeter; [caseback] - Transparent screw-down; [Crown] - Screw-down; [Strap] - Calf leather; [Shape] - Round; [Dial] - Silver reverse panda; [Seconds] - Subdial; [Date] - true; [Calendar] - false; [Chiming] - false; [Chronograph] - true; [Compass] - false; [dateCompilation] - false; [DigitalDisplay] - false; [Dress] - false; [Field] - false; [GMT] - false; [Mechanical Alarm] - false; [Moonphase] - false; [Tourbillon] - false; [worldTimer] - false; [powerReserveIndicator] - false; [Diver] - false; [Pilot] - false; [racing] - true; [Skeleton] - false; [Vintage] - false; [StyleFormal] - false; [StyleCasual] - true; [StyleSports] - true; [StyleTravel] - false; [StyleAdventure] - false; [StyleCollector] - true; [StyleTool] - true; [StyleStatement] - true; [StyleVintage] - true; [StyleSmart] - false; [StyleCustom] - false; [TPS_new] - 4.6; [TPSgrade] - B+; [TPSimpliedPrice] - 9500;

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