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

## Watch Summary
The Jaeger-LeCoultre Master Ultra Thin Moon in rose gold is a pinnacle of refined dress watchmaking, showcasing an exquisitely slim 39mm pink gold case that houses the in-house automatic Calibre 925 with a 70-hour power reserve, featuring a poetic moonphase at 6 o'clock accurate for over 122 years and a pointer date, perfectly suited for the sophisticated collector who values understated elegance and haute horlogerie complications on formal occasions.

## Overall Watch Rating: 9.3/10.0

**History & Innovation Metric (9.9/10.0)** - Jaeger-LeCoultre's 190-year legacy of groundbreaking calibers and complications places it alongside Patek Philippe in pioneering ultra-thin movements with exceptional accuracy.

**Movement Metric (9.9/10.0)** - The Calibre 925 delivers haute-level finishing, 70-hour reserve, and chronometry rivaling Vacheron Constantin's slimmest automatics.

**Material Metric (9.8/10.0)** - Pink gold case with double AR sapphire and masterful polishing rivals the precious metal mastery of A. Lange & Söhne.

**Dials & Design Metric (9.7/10.0)** - The opaline guilloché dial, blued hands, and harmonious moonphase layout evoke the timeless poise of historic JLC Reversos.

**Brand Metric (9.5/10.0)** - As a high-end luxury icon with unmatched in-house mastery, it stands shoulder-to-shoulder with Audemars Piguet in prestige and craft.

**Rarity Metric (9.4/10.0)** - At its price point and limited per-model production, it offers scarcity akin to select Omega Speedmasters.

**Functions Metric (8.8/10.0)** - Solid timekeeping plus moonphase and date provide practical poetry comparable to IWC Portugiesers.

**Complications Metric (8.3/10.0)** - The long-accuracy moonphase and pointer date shine like those in Glashütte Original's Senator Excellence.

**Versatility Metric (8.2/10.0)** - Ultra-thin profile suits formal and upscale casual wear much like a Cartier Tank but with superior complications.

## Total Performance Score (TPS): 9.3

## WM Collector Grade: A+

## Performance Insights: Excels in movement, materials, and historical prestige while offering strong complications and design; delivers outstanding value well above its implied price benchmark.

## TPS Interpretation: Exceptional Value: This watch overdelivers on haute horlogerie refinement and innovation far beyond price-expected norms.

## Watch Data
[https://www.jaeger-lecoultre.com/content/dam/jlc/master-ultra-thin/master-ultra-thin-moon/q1238420/jlc-q1238420-master-ultra-thin-moon-front.png] - [Front view of rose gold Master Ultra Thin Moon]; [https://www.jaeger-lecoultre.com/content/dam/jlc/master-ultra-thin/master-ultra-thin-moon/q1238420/jlc-q1238420-master-ultra-thin-moon-back.png] - [Back view showing Calibre 925]; [] - [No lume]; [JLC MUT Moon RG] - [Jaeger-LeCoultre Master Ultra Thin Moon Rose Gold]; [Jaeger-LeCoultre] - [Jaeger-LeCoultre]; [Master Ultra Thin Moon] - [Q1238420]; [Switzerland] - [Switzerland]; [https://www.jaeger-lecoultre.com/us-en/watches/master-ultra-thin/master-ultra-thin-moon/q1238420-master-ultra-thin-moon] - [https://www.jaeger-lecoultre.com/us-en/watches/master-ultra-thin/master-ultra-thin-moon/q1238420-master-ultra-thin-moon]; [] - []; [Automatic] - [Automatic]; [Calibre 925] - [Calibre 925]; [0] - [0]; [Exquisite ultra-thin pink gold dress watch with moonphase at 6 o'clock, pointer date at 2 o'clock, small seconds subdial, opaline dial, and exceptional 70-hour power reserve] - [Exquisite ultra-thin pink gold dress watch with moonphase at 6 o'clock, pointer date at 2 o'clock, small seconds subdial, opaline dial, and exceptional 70-hour power reserve]; [39] - [39]; [48.2] - [48.2]; [7.95] - [7.95]; [20] - [20]; [50] - [50]; [70] - [70]; [28800] - [28800]; [No] - [No]; [28] - [28]; [18K Pink Gold] - [18K Pink Gold]; [Sapphire double-sided anti-reflective] - [Sapphire double-sided anti-reflective]; [Fixed] - [Fixed]; [Sapphire exhibition] - [Sapphire exhibition]; [Pink gold push-pull] - [Pink gold push-pull]; [Brown alligator leather] - [Brown alligator leather]; [Round] - [Round]; [Opaline guilloché] - [Opaline guilloché]; [Small seconds subdial] - [Small seconds subdial]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [9.3] - [9.3]; [A+] - [A+]; [62000] - [62000];

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