# Doxa Sub 300 Carbon Review by A.I. WatchMetrics

## Watch Summary
The Doxa Sub 300 Carbon is a professional tool diver blending modern carbon composite construction with the iconic cushion-shaped design of the original 1967 saturation diver, appealing to serious enthusiasts and adventurers seeking lightweight durability, exceptional legibility via Super-LumiNova X1 lume, and reliable performance powered by a COSC-certified Sellita SW200-1 automatic movement offering 38 hours of power reserve.

## Overall Watch Rating: 7.0/10.0

**Brand Metric (6.5/10.0)** - Doxa holds strong enthusiast appeal as a Swiss dive specialist with low production, on par with brands like Sinn or Oris.
**History & Innovation Metric (8.8/10.0)** - Pioneering the first 300m-rated dive watch in 1967 with unique cushion ergonomics and bezel innovations places it near the legacy of early Rolex Submariners.
**Rarity Metric (6.4/10.0)** - At around $5,000, it offers moderate exclusivity typical of niche limited-run divers without extreme scarcity.
**Material Metric (9.4/10.0)** - Premium carbon composite case and bezel paired with sapphire AR crystal and meticulous brushing surpass most titanium divers like the Omega Seamaster.
**Movement Metric (6.2/10.0)** - The COSC-certified Sellita SW200-1 delivers reliable accuracy akin to upgraded ETA 2824s in mid-tier tool watches.
**Complications Metric (4.0/10.0)** - A simple date window provides basic utility, standard for divers but below expectations of multifunction chronographs.
**Functions Metric (5.0/10.0)** - Core timekeeping with date matches everyday divers like the Seiko Prospex but lacks advanced features.
**Versatility Metric (8.3/10.0)** - Excels from beach to boardroom with rubber strap compatibility and robust 300m rating, rivaling the Blancpain Fifty Fathoms.
**Dials & Design Metric (8.8/10.0)** - Iconic legible dial, bezel, and lume setup with cushion flair stands out like classic Compressors from the 1970s.

## Total Performance Score (TPS): 4.5
## TPS Interpretation: Fair Value: Delivers heritage, materials, and tool-watch toughness but basic specs lag slightly behind price expectations for added functions.

## WM Collector Grade: C+
## Performance Insights: Excels in materials, history, design, and versatility for adventure use, while movement and functions offer average performance versus the implied fair-market price of around $2,500.

## Watch Data
[Picture URL] - https://doxawatches.com/app/uploads/2023/07/SUB300-Carbon-Black-01.png; [backPicture] - N/A; [lumePicture] - N/A; [Nickname] - Sub 300 Carbon; [Brand] - Doxa; [Model] - SUB 300 Carbon; [Country] - Switzerland; [Product Link] - https://doxawatches.com/watches/sub-300/sub-300-carbon/; [reviewLink] - N/A; [Movement Type] - Automatic; [Movement Name] - Sellita SW200-1; [# MSRP] - 5150; [# Secondary] - 4500; [# Production] - Unlimited; [watchDescription] - Carbon composite cushion case diver with COSC automatic, 300m WR, unidirectional bezel; [caseWidth] - 39; [lugToLugLength] - 46.5; [thickness] - 12.3; [lug] - 20; [waterResist] - 300; [powerReserve] - 38; [beatFrequency] - 28800; [lume] - Super-LumiNova X1 GL C1; [jewels] - 26; [caseMaterial] - Carbon Composite; [watchGlass] - Sapphire anti-reflective; [Bezel] - Unidirectional Carbon Composite; [caseback] - Screw-down Sapphire; [Crown] - Screw-down; [Strap] - Rubber; [Shape] - Cushion; [Dial] - Black; [caseShape] - Cushion; [Seconds] - 1; [Date] - 1; [Calendar] - 0; [Chiming] - 0; [Chronograph] - 0; [Compass] - 0; [dateCompilation] - 0; [DigitalDisplay] - 0; [Dress] - 0; [Field] - 0; [GMT] - 0; [Mechanical Alarm] - 0; [Moonphase] - 0; [Tourbillon] - 0; [worldTimer] - 0; [powerReserveIndicator] - 0; [Diver] - 1; [Pilot] - 0; [racing] - 0; [Skeleton] - 0; [Vintage] - 0; [StyleFormal] - 0; [StyleCasual] - 1; [StyleSports] - 1; [StyleTravel] - 0; [StyleAdventure] - 1; [StyleCollector] - 1; [StyleTool] - 1; [StyleStatement] - 1; [StyleVintage] - 0; [StyleSmart] - 0; [StyleCustom] - 0; [TPS_new] - 4.5; [TPSgrade] - C+; [TPSimpliedPrice] - 2500;

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