# Jaeger-LeCoultre Master Ultra Thin Moon Review by A.I. WatchMetrics

## Watch Summary
The Jaeger-LeCoultre Master Ultra Thin Moon is an exquisite dress watch embodying classic elegance with its ultra-slim 7.85mm stainless steel case, opaline silver dial featuring a poetic moonphase and small seconds subdial at 6 o'clock, powered by the in-house automatic Calibre 925 with an impressive 70-hour power reserve, perfectly suited for the sophisticated professional or collector who values refined haute horlogerie subtlety over ostentation.

## Overall Watch Rating: 8.8/10.0

**Brand Metric (9.6/10.0)** - Jaeger-LeCoultre stands as a pillar of high-end luxury with unmatched heritage and in-house mastery, rivaling Patek Philippe in prestige and craftsmanship.
**Movement Metric (9.4/10.0)** - The Calibre 925 delivers exceptional in-house automatic performance with superior finishing and efficiency, on par with top Lange & Söhne calibers.
**History & Innovation Metric (9.3/10.0)** - JLC's centuries-old legacy of movement innovation shines through this ultra-thin moonphase execution, benchmarked against iconic Reverso complications.
**Dials & Design Metric (9.3/10.0)** - The minimalist opaline dial and razor-thin profile exude timeless sophistication, comparable to the finest Vacheron Constantin Patrimony designs.
**Material Metric (9.2/10.0)** - Premium stainless steel with sapphire crystal and meticulous brushing/polishing elevates it to luxury standards akin to Audemars Piguet Royal Oak finishes.
**Versatility Metric (8.5/10.0)** - This formal piece transitions seamlessly from boardroom to evening wear, outperforming bulkier dress watches like the Cartier Tank.
**Complications Metric (8.2/10.0)** - The precisely engineered moonphase adds poetic functionality without excess, matching the utility of Blancpain's classic moon models.
**Rarity Metric (8.0/10.0)** - At its price point and limited JLC production, it offers strong exclusivity similar to niche Omega ultra-thins.
**Functions Metric (7.8/10.0)** - Core timekeeping with moonphase provides reliable utility, though it trails multifunction tool watches like IWC Portugiesers.

## Total Performance Score (TPS): 9.9

## WM Collector Grade: A+

## Performance Insights: Exceptional strengths in brand prestige, movement excellence, and design refinement deliver outsized value against an implied price more than double its retail, with minor room for growth in functional breadth.

## TPS Interpretation: Exceptional Value: The watch provides haute horlogerie mastery and poetic complications far surpassing expectations at its price point.

## Watch Data
[Picture URL] - https://www.jaeger-lecoultre.com/dam/jlc/master-ultra-thin/master-ultra-thin-moon/2023/q1368470/Q1368470_001.jpg/quality=85; [backPicture] - https://www.jaeger-lecoultre.com/dam/jlc/master-ultra-thin/master-ultra-thin-moon/2023/q1368470/Q1368470_002.jpg/quality=85; [lumePicture] - none; [Nickname] - JLC MUT Moon; [Brand] - Jaeger-LeCoultre; [Model] - Master Ultra Thin Moon; [Country] - Switzerland; [Product Link] - https://www.jaeger-lecoultre.com/us-en/watches/master-ultra-thin/master-ultra-thin-moon/q1368470; [reviewLink] - ; [Movement Type] - Automatic; [Movement Name] - Calibre 925; [# Secondary] - 1; [watchDescription] - Ultra-thin dress watch with moonphase and small seconds powered by in-house automatic movement; [caseWidth] - 39; [lugToLugLength] - 46.9; [thickness] - 7.85; [lug] - 20; [waterResist] - 50; [powerReserve] - 70; [beatFrequency] - 28800; [lume] - No; [jewels] - 28; [caseMaterial] - Stainless steel; [watchGlass] - Sapphire; [Bezel] - Fixed polished; [caseback] - Sapphire see-through; [Crown] - Signed push-pull; [Strap] - Alligator leather; [Shape] - Round; [Dial] - Opaline silver-brushed; [Seconds] - Yes; [Date] - No; [Calendar] - No; [Chiming] - No; [Chronograph] - No; [Compass] - No; [dateCompilation] - No; [DigitalDisplay] - No; [Dress] - Yes; [Field] - No; [GMT] - No; [Mechanical Alarm] - No; [Moonphase] - Yes; [Tourbillon] - No; [worldTimer] - No; [powerReserveIndicator] - No; [Diver] - No; [Pilot] - No; [racing] - No; [Skeleton] - No; [Vintage] - No; [StyleFormal] - Yes; [StyleCasual] - No; [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] - 28500;

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