# Seiko JDM SARX045 Review by A.I. WatchMetrics

## Watch Summary
The Seiko JDM SARX045 is a refined limited-edition Presage Sharp Edged dress watch exclusive to the Japanese market, boasting a 40.2mm stainless steel case with striking angular facets and mirror-like Zaratsu polishing, a captivating sunray black dial with applied indices and polished dauphine hands, ideal for discerning collectors and enthusiasts desiring subtle JDM prestige paired with everyday elegance; it houses the in-house 6R35 automatic movement with a 70-hour power reserve, hacking seconds, and manual winding capability.

## Overall Watch Rating: 7.1/10.0

**Dials & Design Metric (9.5/10.0)** - The mesmerizing sunray black dial and multi-faceted Zaratsu polishing create a hypnotic depth and sophistication rivaling entry-level Grand Seiko dress pieces.
**Material Metric (9.4/10.0)** - Superb stainless steel construction with exceptional dual brushing/mirroring and box-shaped sapphire crystal delivers near-haute finishing quality on par with Omega's premium cases.
**Cohesiveness Metric (8.5/10.0)** - Every element from the angular lugs to the sunray dial harmonizes into a cohesive modern dress aesthetic, akin to a well-curated microbrand collection standout.
**Movement Metric (8.2/10.0)** - The 6R35 offers impressive 70-hour reserve, solid accuracy, and in-house reliability comparable to ETA 2824 upgrades in Tudor Black Bay models.
**Versatility Metric (8.0/10.0)** - With 100m water resistance, leather strap, and dress-sport balance, it transitions seamlessly from office to casual outings like a versatile Oris Artelier.
**History & Innovation Metric (7.6/10.0)** - Seiko's storied legacy in craftsmanship shines through innovative Zaratsu techniques, echoing the brand's pivotal role in quartz revolution but grounded in mechanical tradition.
**Brand Metric (5.4/10.0)** - Seiko holds strong mid-tier reliability with enthusiast cult status, performing similarly to Hamilton or Sinn in accessible premium segments.
**Rarity Metric (5.1/10.0)** - Limited to 2,000 JDM pieces at this price point, it provides solid exclusivity on par with other regional Seiko specials like Credor editions.
**Functions Metric (4.8/10.0)** - Core time and date functions are dependable but basic, matching standard fare in mid-range automatics like the Christopher Ward C60.
**Complications Metric (4.0/10.0)** - A simple date window adds utility without complexity, typical of straightforward dress watches like Nomos Club Campus.

## Total Performance Score (TPS): 9.9

## WM Collector Grade: A+

## Performance Insights: Exceptional strengths in dials/design, materials, and movement elevate it above peers, while basic complications and functions are minor weaknesses; it crushes value expectations trading at roughly half its implied performance price.

## TPS Interpretation: Exceptional Value: This watch delivers outsized refinement, durability, and exclusivity far exceeding what's typical at its market price, making it a collector's steal.

## Watch Data
[Picture URL] - https://www.seikowatches.com/content/dam/seiko/jp/product-images/presage/sarx045/SARX045_1.jpg; [backPicture] - https://www.seikowatches.com/content/dam/seiko/jp/product-images/presage/sarx045/SARX045_3.jpg; [lumePicture] - N/A; [Nickname] - Sharp Edged Black Star; [Brand] - Seiko; [Model] - SARX045; [Country] - Japan; [Product Link] - https://www.seikowatches.com/jp-ja/products/presage/SARX045; [reviewLink] - N/A; [Movement Type] - Automatic; [Movement Name] - 6R35; [# Secondary] - 0; [watchDescription] - JDM limited edition (2,000 pcs) Presage Sharp Edged dress watch with black sunray dial, angular Zaratsu-polished case, and 70hr power reserve automatic.; [caseWidth] - 40.2; [lugToLugLength] - 46.4; [thickness] - 11.8; [lug] - 20; [waterResist] - 100; [powerReserve] - 70; [beatFrequency] - 21600; [lume] - None; [jewels] - 24; [caseMaterial] - Stainless Steel; [watchGlass] - Box-shaped Sapphire; [Bezel] - Fixed; [caseback] - Exhibition Sapphire; [Crown] - Screw-down; [Strap] - Alligator Leather; [Shape] - Round; [Dial] - Sunray Black; [Seconds] - Yes; [Date] - Yes; [Calendar] - No; [Chiming] - No; [Chronograph] - No; [Compass] - No; [dateCompilation] - No; [DigitalDisplay] - No; [Dress] - Yes; [Field] - No; [GMT] - No; [Mechanical Alarm] - No; [Moonphase] - No; [Tourbillon] - No; [worldTimer] - No; [powerReserveIndicator] - No; [Diver] - No; [Pilot] - No; [racing] - No; [Skeleton] - No; [Vintage] - No; [StyleFormal] - Yes; [StyleCasual] - Yes; [StyleSports] - No; [StyleTravel] - No; [StyleAdventure] - No; [StyleCollector] - Yes; [StyleTool] - No; [StyleStatement] - Yes; [StyleVintage] - No; [StyleSmart] - No; [StyleCustom] - No; [TPS_new] - 9.9; [TPSgrade] - A+; [TPSimpliedPrice] - 2850;

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