# Oris Aquis Date Caliber 400 Review by A.I. WatchMetrics

## Watch Summary
The Oris Aquis Date Caliber 400 is a professional-grade dive watch in the sporty Aquis collection, featuring a bold 43.5mm stainless steel case with unidirectional ceramic bezel, a clean black dial with applied indices and Super-LumiNova lume, and the brand's flagship in-house Calibre 400 automatic movement boasting an impressive 120-hour power reserve, 10x better anti-magnetism than standard, and COSC certification—perfect for adventure enthusiasts and value-driven collectors who want high-spec diving capability without ultra-luxury pricing.

## Overall Watch Rating: 7.8/10.0

**Movement Metric (9.7/10.0)** - The in-house Calibre 400 stands out with its 120-hour power reserve, silicon hairspring for extreme anti-magnetism, and COSC-level accuracy, matching the performance of elite movements from Omega or Zenith at half the cost.
**Material Metric (9.3/10.0)** - Premium 316L stainless steel paired with a domed sapphire crystal (anti-reflective inside) and durable ceramic bezel insert deliver top-tier build quality comparable to Rolex Submariner cases.
**Dials & Design Metric (8.9/10.0)** - The balanced black dial with sword hands, ceramic bezel scale, and excellent lume offers a refined yet tool-like diver aesthetic on par with Blancpain Fifty Fathoms simplicity.
**History & Innovation Metric (8.8/10.0)** - Oris' 120-year heritage in affordable mechanicals culminates in the revolutionary Calibre 400 platform, bringing in-house silicon tech and long reserves to the masses like Seiko's Grand Seiko innovations.
**Versatility Metric (8.6/10.0)** - This 300m diver transitions seamlessly from underwater adventures to office casual with its steel bracelet option and understated elegance, much like a Tudor Black Bay.
**Brand Metric (7.8/10.0)** - Oris shines as an independent Swiss specialist in value-driven tool watches, holding its own against entry-luxury peers like Tudor or Longines in craftsmanship and heritage.
**Functions Metric (7.2/10.0)** - Core timekeeping, magnified date at 6 o'clock, and rotating dive bezel provide solid utility for daily and dive use, akin to standard Seiko Prospex divers.
**Rarity Metric (6.3/10.0)** - At around $4,500 retail with moderate production volumes, it offers good exclusivity for the price but lacks the scarcity of limited-edition pieces from microbrands.
**Complications Metric (3.9/10.0)** - The simple date window is reliable but basic compared to multifunction divers like the Breitling Superocean with chronograph additions.

## Total Performance Score (TPS): 9.9

## WM Collector Grade: A+

## Performance Insights: Excels in movement, materials, and design for benchmark-beating specs, while complications and rarity are average; delivers exceptional value trading at a steep discount to its implied $11,500 performance equivalent.

## TPS Interpretation: Exceptional Value: The watch vastly overperforms price expectations across technical and aesthetic metrics, positioning it as a smart long-term collector investment.

## Watch Data
[Picture URL] - https://www.oris.ch/-/media/project/oris-watch/oris-watch-website/master/products/aquis/2023/aquis-date-caliber-400/01-400-7768-4153-07-8-24-05peb/01-400-7768-4153-07-8-24-05peb_front.png; [backPicture] - https://www.oris.ch/-/media/project/oris-watch/oris-watch-website/master/products/aquis/2023/aquis-date-caliber-400/01-400-7768-4153-07-8-24-05peb/01-400-7768-4153-07-8-24-05peb_back.png; [lumePicture] - https://monochrome-watches.com/wp-content/uploads/2023/08/oris-aquis-date-calibre-400-lume.jpg; [Nickname] - Aquis Date C400; [Brand] - Oris; [Model] - Aquis Date Caliber 400; [Country] - Switzerland; [Product Link] - https://www.oris.ch/en/watch/aquis/01-400-7768-4153-07-8-24-05PEB; [reviewLink] - https://www.hodinkee.com/articles/the-oris-aquis-date-caliber-400-proves-good-things-come-big-packages; [Movement Type] - Automatic; [Movement Name] - Calibre 400; [# Secondary] - 1; [watchDescription] - Robust 300m dive watch with in-house automatic movement, ceramic bezel, and 120-hour power reserve; [caseWidth] - 43.5; [lugToLugLength] - 50.4; [thickness] - 13.45; [lug] - 24; [waterResist] - 300; [powerReserve] - 120; [beatFrequency] - 28800; [lume] - Super-LumiNova; [jewels] - 21; [caseMaterial] - 316L Stainless Steel; [watchGlass] - Domed Sapphire (anti-reflective inside); [Bezel] - Unidirectional rotating ceramic; [caseback] - Sapphire see-through; [Crown] - Screw-down; [Strap] - Stainless steel bracelet; [Shape] - Round; [Dial] - Black; [Seconds] - yes; [Date] - yes; [Calendar] - no; [Chiming] - no; [Chronograph] - no; [Compass] - no; [dateCompilation] - no; [DigitalDisplay] - no; [Dress] - no; [Field] - no; [GMT] - no; [Mechanical Alarm] - no; [Moonphase] - no; [Tourbillon] - no; [worldTimer] - no; [powerReserveIndicator] - no; [Diver] - yes; [Pilot] - no; [racing] - no; [Skeleton] - no; [Vintage] - no; [StyleFormal] - no; [StyleCasual] - yes; [StyleSports] - yes; [StyleTravel] - no; [StyleAdventure] - yes; [StyleCollector] - yes; [StyleTool] - yes; [StyleStatement] - yes; [StyleVintage] - no; [StyleSmart] - no; [StyleCustom] - no; [TPS_new] - 9.9; [TPSgrade] - A+; [TPSimpliedPrice] - 11500;

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