# Oris Big Crown X1 Calculator Review by A.I. WatchMetrics

## Watch Summary
The Oris Big Crown X1 Calculator is a robust pilot-style watch featuring a distinctive slide rule bezel for aviation calculations, a large 46mm stainless steel case with a big crown for easy glove operation, targeting aviation enthusiasts and adventurers who appreciate functional tool watches with a vintage-inspired aesthetic; it houses an automatic Oris Caliber 645 movement based on the ETA 2836-2 with a 38-hour power reserve, combining reliable timekeeping with practical features like a date window and luminous hands for low-light visibility.

## Overall Watch Rating: 6.8/10.0

**Brand Metric (7.5/10.0)** - Oris earns a solid entry-level luxury score for its Swiss heritage and focus on aviation-inspired designs, comparable to brands like Tudor in accessible premium watchmaking.
**History & Innovation Metric (7.2/10.0)** - This watch builds on Oris's long-standing tradition of pilot watches dating back to the 1930s, with the innovative slide rule bezel adding functional aviation calculations that set it apart from basic time-only models.
**Rarity Metric (4.5/10.0)** - While not a limited edition, its specialized calculator feature and moderate production make it somewhat uncommon, though it's more accessible than ultra-rare pieces like vintage Rolex GMTs.
**Material Metric (7.8/10.0)** - The stainless steel case with sapphire crystal and anti-reflective coating offers durable, high-quality construction, on par with mid-tier divers like the Oris Aquis in terms of robustness and finish.
**Movement Metric (6.5/10.0)** - The automatic Oris 645 caliber, derived from the reliable ETA 2836-2, provides dependable performance with a 38-hour power reserve, though it lacks the in-house sophistication of higher-end movements like those in Grand Seiko.
**Complications Metric (5.0/10.0)** - Featuring a date function and a slide rule for calculations, it offers practical complications for pilots, similar to the utility found in Breitling's Navitimer but without more advanced chronograph elements.
**Functions Metric (6.2/10.0)** - Beyond standard timekeeping, the watch includes a date display and bezel-based calculator for unit conversions and fuel estimates, making it more functional than a simple three-hander like a basic Seiko.
**Dials & Design Metric (7.5/10.0)** - The black dial with Arabic numerals, luminous markers, and oversized crown evokes classic aviation aesthetics, delivering a bold and legible design akin to the IWC Big Pilot but at a more affordable price point.
**Versatility Metric (7.0/10.0)** - Its rugged pilot style suits casual and adventurous wear, from daily use to outdoor activities, offering good versatility like the Sinn 104 but less formal than dress watches.

## Total Performance Score (TPS): 3.2

## WM Collector Grade: B-

## Performance Insights: The watch excels in materials, brand heritage, and design but underperforms in rarity and advanced complications, providing fair value compared to its implied price of around $2,800.

## TPS Interpretation: Good Value: The watch delivers strong aviation functionality and build quality that punches above its price class, ideal for enthusiasts seeking practical innovation without luxury premiums.

## Watch Data
[Picture URL] - https://www.oris.ch/images/watches/big-crown-x1-calculator.jpg; [backPicture] - https://www.oris.ch/images/watches/big-crown-x1-calculator-back.jpg; [lumePicture] - https://www.oris.ch/images/watches/big-crown-x1-calculator-lume.jpg; [Nickname] - X1 Calculator; [Brand] - Oris; [Model] - Big Crown X1 Calculator; [Country] - Switzerland; [Product Link] - https://www.oris.ch/en/watch/big-crown-x1-calculator; [reviewLink] - https://www.hodinkee.com/articles/oris-big-crown-x1-calculator-review; [Movement Type] - Automatic; [Movement Name] - Oris 645 (base ETA 2836-2); [# Secondary] - 0; [watchDescription] - Aviation-inspired watch with slide rule bezel; [caseWidth] - 46; [lugToLugLength] - 54; [thickness] - 14.5; [lug] - 22; [waterResist] - 100; [powerReserve] - 38; [beatFrequency] - 28800; [lume] - Super-LumiNova; [jewels] - 27; [caseMaterial] - Stainless Steel; [watchGlass] - Sapphire with AR coating; [Bezel] - Bidirectional slide rule; [caseback] - Solid screw-down; [Crown] - Oversized screw-down; [Strap] - Leather; [Shape] - Round; [Dial] - Black with Arabic numerals; [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] - no; [Pilot] - yes; [racing] - no; [Skeleton] - no; [Vintage] - yes; [StyleFormal] - no; [StyleCasual] - yes; [StyleSports] - yes; [StyleTravel] - yes; [StyleAdventure] - yes; [StyleCollector] - yes; [StyleTool] - yes; [StyleStatement] - yes; [StyleVintage] - yes; [StyleSmart] - no; [StyleCustom] - no; [TPS_new] - 7.2; [TPSgrade] - B-; [TPSimpliedPrice] - 2800;

**A.I. WatchMetrics Review v37.4 Grok 4. December 16, 2025.**