# Tudor Black Bay GMT Review by A.I. WatchMetrics

## Watch Summary
The Tudor Black Bay GMT is a robust sports watch in the tool-diver/travel category, featuring a 41mm stainless steel case with a signature bidirectional "Pepsi" red-and-blue ceramic bezel for GMT functionality, black dial with luminous snowflake hands and markers, powered by the in-house automatic MT5652 movement offering 70 hours of power reserve, ideal for adventure-seeking enthusiasts who value Rolex-adjacent heritage at an accessible luxury price point.

## Overall Watch Rating: 8.7/10.0

**Versatility Metric (9.5/10.0)** - Excels as a do-it-all GMT traveler, dressing up or down effortlessly like a Rolex GMT-Master II but at half the cost.
**Dials & Design Metric (9.2/10.0)** - Iconic snowflake hands, Pepsi bezel, and textured black dial deliver timeless tool-watch appeal comparable to vintage Rolex Subs.
**Movement Metric (9.1/10.0)** - The MT5652 in-house automatic with COSC certification, 70-hour reserve, and silicon hairspring outperforms many rivals in its class like the Omega 8900.
**Material Metric (9.0/10.0)** - Premium 316L steel case, scratch-resistant sapphire crystal with AR coating, and durable ceramic bezel match the build quality of higher-end Seikos.
**Brand Metric (8.5/10.0)** - Tudor's Rolex-backed heritage and consistent quality place it firmly in entry-level luxury, akin to a more attainable Omega.
**Functions Metric (8.4/10.0)** - Robust lineup including GMT hand, date, and 200m water resistance provides everyday utility on par with mid-tier dive watches.
**History & Innovation Metric (8.2/10.0)** - Builds on Tudor's dive heritage with modern in-house GMT tech, echoing the impact of the original Black Bay line.
**Rarity Metric (6.8/10.0)** - Solid demand at $4,500 retail but high production volumes keep it from elite scarcity like limited Omega Seamaster variants.
**Complications Metric (6.5/10.0)** - Functional 24-hour GMT bezel and jumping local hour hand add practical travel utility, though simpler than true world-timers.

## Total Performance Score (TPS): 8.7

## WM Collector Grade: A

## Performance Insights: Strengths in versatility, design, and movement shine for daily wear, offering exceptional value well below its $8,200 implied price with minor room for rarer complications.

## TPS Interpretation: Strong Value: The watch delivers premium sports functionality and heritage appeal exceeding expectations for its price point.

## Watch Data
[https://www.tudorwatch.com/sites/g/files/fkqsyt916/files/styles/hero_banner/public/2023-09/M79830RB-0001_1.jpg?itok=def123] - [front]; [https://www.tudorwatch.com/sites/g/files/fkqsyt916/files/2023-09/M79830RB-0001_back.jpg] - [back]; [] - [lumePicture]; [Pepsi GMT] - [Pepsi GMT]; [Tudor] - [Tudor]; [Black Bay GMT] - [Black Bay GMT]; [Switzerland] - [Switzerland]; [https://www.tudorwatch.com/en/watches/black-bay-gmt/m79830rb-0001] - [https://www.tudorwatch.com/en/watches/black-bay-gmt/m79830rb-0001]; [] - [reviewLink]; [Automatic] - [Automatic]; [Calibre MT5652] - [Calibre MT5652]; [GMT] - [GMT]; [Robust stainless steel sports watch with Pepsi GMT bezel, snowflake hands, 200m WR, ideal for travel and diving] - [Robust stainless steel sports watch with Pepsi GMT bezel, snowflake hands, 200m WR, ideal for travel and diving]; [41] - [41]; [50.2] - [50.2]; [14.6] - [14.6]; [22] - [22]; [200] - [200]; [70] - [70]; [28800] - [28800]; [Super-LumiNova] - [Super-LumiNova]; [26] - [26]; [Stainless Steel 316L] - [Stainless Steel 316L]; [Sapphire with anti-reflective coating] - [Sapphire with anti-reflective coating]; [Bidirectional rotatable with 24-hour graduated Cerachrom disc in red and blue ceramic] - [Bidirectional rotatable with 24-hour graduated Cerachrom disc in red and blue ceramic]; [Solid] - [Solid]; [Screw-down] - [Screw-down]; [Stainless steel bracelet with T-fit clasp] - [Stainless steel bracelet with T-fit clasp]; [Round] - [Round]; [Black with rhodium plated hands and markers] - [Black with rhodium plated hands and markers]; [Subdials] - [Subdials]; [Yes at 3 o'clock] - [Yes at 3 o'clock]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [Yes] - [Yes]; [Yes] - [Yes]; [Yes] - [Yes]; [Yes] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [8.7] - [8.7]; [A] - [A]; [8200] - [8200];

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