# IWC Portugieser Yacht Club Moon & Tide Review by A.I. WatchMetrics

## Watch Summary
The IWC Portugieser Yacht Club Moon & Tide is an elegant luxury sports watch with nautical complications, featuring a classic oversized Portugieser case design, sunray blue dial, patented tide indicator at 12 o'clock, perpetual moonphase at 6 o'clock, small seconds at 9 o'clock, and power reserve indicator at 3 o'clock, powered by the in-house automatic Calibre 89802 with 68 hours of power reserve, appealing to sophisticated collectors who value maritime heritage and high-end finishing.

## Overall Watch Rating: 9.1/10.0

**Dials & Design Metric (9.6/10.0)** - The exquisite sunray dial with applied rhodium-plated indices and feuille hands rivals Patek Philippe in refined legibility and aesthetic harmony.
**Movement Metric (9.7/10.0)** - The in-house Calibre 89802 delivers exceptional finishing, 68-hour reserve, and reliable performance on par with top Grand Seiko movements.
**Material Metric (9.4/10.0)** - Premium stainless steel construction with double-sided AR sapphire crystals and meticulous brushing/polishing matches Rolex Yacht-Master standards.
**Complications Metric (9.5/10.0)** - Innovative tide indicator and perpetual moonphase provide rare utility comparable to Blancpain's ocean-focused calibers.
**Rarity Metric (9.0/10.0)** - At its price point, it offers scarcity akin to limited-production luxury divers without being a low-run exclusive.
**History & Innovation Metric (9.0/10.0)** - IWC's pioneering tide complication and iconic Portugieser lineage echo Vacheron Constantin's historic contributions to complications.
**Brand Metric (8.7/10.0)** - IWC upholds luxury prestige with Swiss craftsmanship similar to Omega's renowned reliability and heritage.
**Functions Metric (8.8/10.0)** - Tide, moonphase, power reserve, and precise timekeeping exceed typical luxury chronometer expectations.
**Versatility Metric (8.3/10.0)** - Suited for formal evenings or yacht decks, it performs like a Breguet Marine but tempered by its substantial 45mm size.

## Total Performance Score (TPS): 7.9
## TPS Interpretation: Good Value: The watch delivers superior complications and movement refinement beyond what's typical at its price.
## WM Collector Grade: A-
## Performance Insights: Dominates in movement, complications, and design while offering strong value against an implied fair price of $18500.

## Watch Data
[Picture URL] - https://www.iwc.com/content/dam/iwc/watchfinder/iwc/portugieser-yacht-club/iw379507/iw379507-front.png/asset-2000.png; [backPicture] - https://www.iwc.com/content/dam/iwc/watchfinder/iwc/portugieser-yacht-club/iw379507/iw379507-back.png/asset-2000.png; [lumePicture] - N/A; [Nickname] - Yacht Club Moon & Tide; [Brand] - IWC; [Model] - Portugieser Yacht Club Moon & Tide; [Country] - Switzerland; [Product Link] - https://www.iwc.com/us/en/watch-collections/portugieser-collection/portugieser-yacht-club-moon-tide/iw379507.html; [reviewLink] - https://www.hodinkee.com/articles/hands-on-iwc-portugieser-yacht-club-moon-and-tide; [Movement Type] - Automatic; [Movement Name] - Calibre 89802; [# MSRP] - 27700; [# Secondary] - 26500; [# Production] - Unlimited; [watchDescription] - Luxury stainless steel Portugieser with tide indicator, perpetual moonphase, power reserve, and small seconds; [caseWidth] - 45.0; [lugToLugLength] - 58.2; [thickness] - 15.8; [lug] - 22.0; [waterResist] - 100; [powerReserve] - 68; [beatFrequency] - 28800; [lume] - Super-LumiNova; [jewels] - 43; [caseMaterial] - Stainless Steel; [watchGlass] - Sapphire (antireflective both sides); [Bezel] - Fixed; [caseback] - Sapphire (see-through); [Crown] - Screw-in; [Strap] - Alligator leather; [Shape] - Round; [Dial] - Blue sunray; [caseShape] - Round; [Seconds] - 1; [Date] - 0; [Calendar] - 0; [Chiming] - 0; [Chronograph] - 0; [Compass] - 0; [dateCompilation] - 0; [DigitalDisplay] - 0; [Dress] - 0; [Field] - 0; [GMT] - 0; [Mechanical Alarm] - 0; [Moonphase] - 1; [Tourbillon] - 0; [worldTimer] - 0; [powerReserveIndicator] - 1; [Diver] - 0; [Pilot] - 0; [racing] - 0; [Skeleton] - 0; [Vintage] - 0; [StyleFormal] - 1; [StyleCasual] - 1; [StyleSports] - 1; [StyleTravel] - 1; [StyleAdventure] - 0; [StyleCollector] - 1; [StyleTool] - 0; [StyleStatement] - 1; [StyleVintage] - 0; [StyleSmart] - 0; [StyleCustom] - 0; [TPS_new] - 7.9; [TPSgrade] - A-; [TPSimpliedPrice] - 18500;

**A.I. WatchMetrics Review v37.10 Grok 4 Fast. December 21, 2025.**