# Vacheron Constantin Perpetual Calendar Ultra-Thin Gold Review by A.I. WatchMetrics

## Watch Summary
The Vacheron Constantin Perpetual Calendar Ultra-Thin Gold, from the Patrimony collection, is a pinnacle of haute horlogerie in the form of an ultra-slim dress watch with a 42mm 18K pink gold case just 7.25mm thick, featuring the in-house automatic Caliber 1120 QP movement with 40-hour power reserve and a full perpetual calendar including day, date, month, leap year indicator, and poetic moonphase at 6 o'clock, perfectly suited for sophisticated collectors who prioritize technical innovation, Geneva Seal finishing, and timeless elegance over rugged utility.

## Overall Watch Rating: 9.2/10.0

**Rarity Metric (9.9/10.0)** - Its exorbitant price exceeding $100,000 and minuscule production numbers place it in the same elite echelon as limited Patek Philippe grand complications.
**Material Metric (9.8/10.0)** - The 18K pink gold case with sapphire crystal (anti-reflective both sides) and impeccable Clous de Paris finishing rivals the best from A. Lange & Söhne.
**Brand Metric (9.7/10.0)** - Vacheron Constantin's 270-year heritage of haute horlogerie mastery and low-volume prestige elevates it alongside F.P. Journe.
**Dials & Design Metric (9.7/10.0)** - The opaline silvered dial with sunburst guilloché center, applied gold indices, and balanced complication layout is as refined as historic Patrimony icons.
**Movement Metric (9.6/10.0)** - The Caliber 1120 QP delivers exceptional complexity, hand-finishing, and reliability benchmarked against top Audemars Piguet in-house calibers.
**History & Innovation Metric (9.4/10.0)** - Pioneering one of the thinnest perpetual calendars ever while upholding centuries of Genevan innovation stacks up to landmark Vacheron milestones.
**Complications Metric (9.2/10.0)** - The perpetual calendar suite with moonphase offers sophisticated utility akin to refined Blancpain models.
**Versatility Metric (7.9/10.0)** - Ideal for black-tie events but less adaptable for sports or daily wear compared to more robust Overseas siblings.
**Functions Metric (7.8/10.0)** - Provides comprehensive timekeeping and calendar functions but lacks extras like GMT or power reserve display found in multifunction Grand Seikos.

## Total Performance Score (TPS): 4.2

## WM Collector Grade: B

## Performance Insights: Dominates in rarity, materials, and brand prestige with masterful movement and design, delivering fair value versus its implied price of $119000 despite moderate versatility for everyday use.

## TPS Interpretation: Fair Value: The watch provides exceptional haute horlogerie complications and craftsmanship with timeless appeal at its price.

## Watch Data
[https://www.vacheron-constantin.com/content/dam/vacheron-constantin/COLLECTIONS/-Patrimony/Patrimony-Perpetual-Calendar-Ultra-Thin/43175-000R-9359/43175-000R-9359-persp.png/_jcr_content/renditions/cq5dam.web.1280.1280.png] - [front]; [https://www.vacheron-constantin.com/content/dam/vacheron-constantin/COLLECTIONS/-Patrimony/Patrimony-Perpetual-Calendar-Ultra-Thin/43175-000R-9359/43175-000R-9359-back.png] - [back]; [] - [none]; [Patrimony Perpetual Calendar Ultra-Thin Gold] - [Patrimony Perpetual Calendar Ultra-Thin Gold]; [Vacheron Constantin] - [Vacheron Constantin]; [Patrimony Perpetual Calendar Ultra-Thin] - [Patrimony Perpetual Calendar Ultra-Thin]; [Switzerland] - [Switzerland]; [https://www.vacheron-constantin.com/us/en/collections/patrimony/43175-000r-9359.html] - [https://www.vacheron-constantin.com/us/en/collections/patrimony/43175-000r-9359.html]; [] - []; [Automatic] - [Automatic]; [Caliber 1120 QP] - [Caliber 1120 QP]; [none] - [none]; [Ultra-thin pink gold perpetual calendar with opaline dial, moonphase at 6, day/month apertures, pointer date, and leap year indicator] - [Ultra-thin pink gold perpetual calendar with opaline dial, moonphase at 6, day/month apertures, pointer date, and leap year indicator]; [42] - [42]; [49] - [49]; [7.25] - [7.25]; [22] - [22]; [30] - [30]; [40] - [40]; [18000] - [18000]; [none] - [none]; [21] - [21]; [18K 5N pink gold] - [18K 5N pink gold]; [sapphire anti-reflective both sides] - [sapphire anti-reflective both sides]; [fixed polished] - [fixed polished]; [sapphire exhibition] - [sapphire exhibition]; [18K 5N pink gold] - [18K 5N pink gold]; [Mississippiensis alligator leather with 18K 5N pink gold buckle] - [Mississippiensis alligator leather with 18K 5N pink gold buckle]; [round] - [round]; [silvered opaline guilloché] - [silvered opaline guilloché]; [central] - [central]; [yes] - [yes]; [yes] - [yes]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [yes] - [yes]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [yes] - [yes]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [yes] - [yes]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [yes] - [yes]; [no] - [no]; [yes] - [yes]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [no] - [no]; [4.2] - [4.2]; [B] - [B]; [119000] - [119000];

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