# Seiko 5 Sports Field GMT SSK023 Review by A.I. WatchMetrics

## Watch Summary
The Seiko 5 Sports Field GMT SSK023 is a versatile field watch blending military-inspired ruggedness with practical GMT functionality for travelers, boasting a compact 39.4mm stainless steel case, black dial with bold Arabic numerals and a distinctive red GMT hand, paired with the reliable in-house automatic Caliber 4R34 movement delivering approximately 41 hours of power reserve.

## Overall Watch Rating: 6.7/10.0

**Versatility Metric (8.5/10.0)** - This GMT field watch excels in everyday adaptability, transitioning seamlessly from urban adventures to global travel much like a Hamilton Khaki Field.

**Dials & Design Metric (8.3/10.0)** - The clean black dial with luminous markers and 24-hour GMT scale offers excellent legibility and purposeful field aesthetics comparable to classic military tools.

**Material Metric (7.9/10.0)** - Stainless steel construction with durable Hardlex crystal provides solid everyday toughness, on par with other mid-tier sports watches like Citizen Promasters.

**Movement Metric (7.4/10.0)** - The 4R34 automatic offers dependable performance with hacking seconds and hand-winding, performing similarly to workhorse ETA 2824 alternatives in entry-luxury pieces.

**History & Innovation Metric (6.6/10.0)** - Seiko's legacy in affordable automatics shines through, though this GMT iteration builds on established designs without groundbreaking novelty akin to Omega's early travelers.

**Functions Metric (7.2/10.0)** - Core timekeeping plus GMT and date deliver practical utility for modern explorers, matching the functionality of basic Tudors.

**Complications Metric (6.3/10.0)** - The independent GMT hand and date window add useful layers without excess, on level with entry-level multi-timezone watches from Tissot.

**Brand Metric (5.3/10.0)** - Seiko upholds mid-tier reliability with enthusiast appeal, comparable to Hamilton or Citizen in the accessible automatic segment.

**Rarity Metric (3.0/10.0)** - Widely available at around $425, it lacks exclusivity like limited microbrand runs but fits mass-appeal field watches.

## Total Performance Score (TPS): 8.4

## WM Collector Grade: A-

## Performance Insights: Versatility and design stand out as strengths delivering excellent utility, while rarity lags, offering strong value well above its implied price of $285.

## TPS Interpretation: Strong Value: The watch overdelivers on practical features and durability for budget-conscious adventurers seeking GMT capability.

## Watch Data
[Picture URL] - https://www.seikowatches.com/content/dam/seiko-global/en/products/seiko-5-sports/2023/ssk023/ssk023_01_w.jpg; [backPicture] - https://www.seikowatches.com/content/dam/seiko-global/en/products/seiko-5-sports/2023/ssk023/ssk023_03_w.jpg; [lumePicture] - https://www.ablogtowatch.com/wp-content/uploads/2023/08/Seiko-5-Sports-Field-GMT-SSK023-14.jpg; [Nickname] - Field GMT SSK023; [Brand] - Seiko; [Model] - 5 Sports Field GMT SSK023; [Country] - Japan; [Product Link] - https://www.seikowatches.com/global-en/products/seiko5sports/collection/2023/ssk023j1; [reviewLink] - https://www.hodinkee.com/articles/seiko-5-sports-field-gmt-ssk021-ssk023-hands-on; [Movement Type] - Mechanical Automatic; [Movement Name] - Caliber 4R34; [# Secondary] - 375; [watchDescription] - Compact field GMT watch with black dial, red GMT hand, nylon strap, and 100m water resistance for adventure and travel; [caseWidth] - 39.4; [lugToLugLength] - 48; [thickness] - 12.9; [lug] - 20; [waterResist] - 100; [powerReserve] - 41; [beatFrequency] - 21600; [lume] - Super-LumiNova; [jewels] - 24; [caseMaterial] - Stainless Steel; [watchGlass] - Hardlex; [Bezel] - Fixed; [caseback] - Solid; [Crown] - Screw-Down; [Strap] - Nylon NATO; [Shape] - Round; [Dial] - Black; [Seconds] - yes; [Date] - yes; [Calendar] - no; [Chiming] - no; [Chronograph] - no; [Compass] - no; [dateCompilation] - no; [DigitalDisplay] - no; [Dress] - no; [Field] - yes; [GMT] - yes; [Mechanical Alarm] - no; [Moonphase] - no; [Tourbillon] - no; [worldTimer] - no; [powerReserveIndicator] - no; [Diver] - no; [Pilot] - no; [racing] - no; [Skeleton] - no; [Vintage] - no; [StyleFormal] - no; [StyleCasual] - yes; [StyleSports] - yes; [StyleTravel] - yes; [StyleAdventure] - yes; [StyleCollector] - yes; [StyleTool] - yes; [StyleStatement] - no; [StyleVintage] - no; [StyleSmart] - no; [StyleCustom] - no; [TPS_new] - 8.4; [TPSgrade] - A-; [TPSimpliedPrice] - 285;

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