# Jaeger-LeCoultre Master Ultra Thin Date Rose Gold Review by A.I. WatchMetrics

## Watch Summary
The Jaeger-LeCoultre Master Ultra Thin Date Rose Gold is a paragon of refined luxury dress watches, boasting a svelte 40mm 18K pink gold case just 7.85mm thick with an opaline silver dial featuring applied Arabic numerals and luminous dauphine hands, a subtle date at 3 o'clock, targeting the sophisticated professional or collector who values timeless elegance and discretion; it houses the exemplary in-house automatic Calibre 899 with a 70-hour power reserve.

## Overall Watch Rating: 8.3/10.0

**Material Metric (9.9/10.0)** - Premium 18K rose gold construction paired with double-sided anti-reflective sapphire rivals the material excellence of Vacheron Constantin Patrimony models.

**Brand Metric (9.7/10.0)** - Jaeger-LeCoultre's unparalleled heritage and in-house mastery position it as a true haute horlogerie contender, on par with A. Lange & Söhne.

**Dials & Design Metric (9.6/10.0)** - The opaline dial, applied markers, and perfectly proportioned ultra-thin case deliver aesthetic perfection akin to the best Patek Philippe Calatravas.

**History & Innovation Metric (9.5/10.0)** - With over 1,200 historic calibres and inventions like the thousandth movement milestone, it embodies pioneering legacy comparable to Breguet.

**Movement Metric (9.4/10.0)** - Calibre 899's slim profile, 70-hour reserve, and Geneva-striped finishing match the refinement of elite in-house efforts like those from F.P. Journe.

**Rarity Metric (9.1/10.0)** - Its high price point and boutique-level production confer exclusivity similar to select IWC Portugieser variants.

**Versatility Metric (8.2/10.0)** - Ideal for formal and business casual wear with elegant adaptability, though less suited to sports than a Rolex Datejust.

**Functions Metric (5.2/10.0)** - Solid timekeeping and date suffice for daily use but trail multifunction stalwarts like Omega Speedmasters.

**Complications Metric (3.9/10.0)** - The straightforward date adds practicality without excess, matching basic luxury peers like Cartier Santos.

## Total Performance Score (TPS): 7.7

## WM Collector Grade: A-

## Performance Insights: Excels in brand prestige, materials, design, history, and movement quality defining luxury dress watches, while complications and functions are appropriately restrained; superior value punching above its implied price.

## TPS Interpretation: Good Value: Premium construction and heritage outperform price-expected performance for discerning buyers.

## Watch Data
[https://www.jaeger-lecoultre.com/content/dam/jlc/master/master-ultra-thin/q1232580/jlc-q1232580-master-ultra-thin-mas-utl-dt-40-rg.png.asset/jlc-q1232580-master-ultra-thin-mas-utl-dt-40-rg.png] - main; [https://www.chrono24.com/images/uhren/184032653/1.jpg] - backPicture; [N/A] - lumePicture; [Master Ultra Thin Date Rose Gold] - Nickname; [Jaeger-LeCoultre] - Brand; [Master Ultra Thin Date] - Model; [Switzerland] - Country; [https://www.jaeger-lecoultre.com/us-en/watches/master-ultra-thin/master-ultra-thin-date/q1232580-master-ultra-thin-date] - Product Link; [https://www.hodinkee.com/articles/the-jaeger-lecoultre-master-ultra-thin-collection] - reviewLink; [Mechanical - Automatic] - Movement Type; [Calibre 899] - Movement Name; [# Secondary] - 25000; [Refined ultra-thin dress watch in 18K rose gold with opaline silver dial, applied indices, dauphine hands, and date at 3 o'clock, showcasing JLC's slimline expertise.] - watchDescription; [40] - caseWidth; [48.3] - lugToLugLength; [7.85] - thickness; [20] - lug; [50] - waterResist; [70] - powerReserve; [28800] - beatFrequency; [None] - lume; [24] - jewels; [18K Rose Gold] - caseMaterial; [Sapphire with double-sided anti-reflective coating] - watchGlass; [Polished fixed] - Bezel; [Sapphire exhibition] - caseback; [Pink gold] - Crown; [Brown alligator leather with pink gold folding buckle] - Strap; [Round] - Shape; [Opaline silver] - Dial; [Yes] - Seconds; [Yes] - Date; [No] - Calendar; [No] - Chiming; [No] - Chronograph; [No] - Compass; [No] - dateCompilation; [No] - DigitalDisplay; [Yes] - Dress; [No] - Field; [No] - GMT; [No] - Mechanical Alarm; [No] - Moonphase; [No] - Tourbillon; [No] - worldTimer; [No] - powerReserveIndicator; [No] - Diver; [No] - Pilot; [No] - racing; [No] - Skeleton; [No] - Vintage; [Yes] - StyleFormal; [Yes] - StyleCasual; [No] - StyleSports; [No] - StyleTravel; [No] - StyleAdventure; [Yes] - StyleCollector; [No] - StyleTool; [Yes] - StyleStatement; [No] - StyleVintage; [No] - StyleSmart; [No] - StyleCustom; [7.7] - TPS_new; [A-] - TPSgrade; [18500] - TPSimpliedPrice;

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