Rolex GMT-Master vs Tudor Black Bay GMT S&G
Ref. 1675 vs Ref. M79833MN-0003
The Rolex GMT-Master and Tudor Black Bay GMT S&G represent one of the most compelling matchups in luxury watches — a sibling rivalry between two brands under the same parent company. With the Rolex GMT-Master priced at ~$32,000 (market value) and the Tudor Black Bay GMT S&G at $5,825, the price gap raises a critical question: does the extra investment in the pricier option deliver proportional value? We break down the specs, market performance, and flip potential to help you decide.
Price Comparison
Rolex
GMT-Master
Tudor
Black Bay GMT S&G
The Rolex GMT-Master is priced at ~$32,000 (market value) while the Tudor Black Bay GMT S&G comes in at $5,825. On the secondary market, the gap widens: the Rolex GMT-Master trades around $32,000 and the Tudor Black Bay GMT S&G around $5,243, a difference of $26,757 favoring the Tudor Black Bay GMT S&G. Currently trending upward at just 0% below retail, this watch retains most of its value on the secondary market. The Tudor Black Bay GMT S&G shows a more modest market premium of -10.0%, holding steady. For investors, the Rolex GMT-Master edges ahead with a flip potential score of 6/10 compared to 2/10.
Specifications
| Specification | Rolex GMT-Master | Tudor Black Bay GMT S&G |
|---|---|---|
| Case Diameter | 40mm | 41mm |
| Case Thickness | 12.0mm | 14.8mm |
| Case Material | Stainless steel | Stainless steel and yellow gold |
| Bezel | Stainless steel with aluminum insert in blue and red | Bidirectional rotating bezel with anodized aluminium insert in brown and black |
| Crystal | Acrylic with Cyclops lens | Sapphire crystal |
| Water Resistance | 50m / 165ft | 200m / 660ft |
| Movement | Rolex calibre 1575 | Tudor Calibre MT5652 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 48 hours | 70 hours |
| Bracelet/Strap | Oyster, folded or riveted links (varies by year) | Stainless steel and yellow gold with riveted-style links |
| Clasp | Oyster folding clasp | Folding clasp with safety catch |
| Lug Width | 20mm | 22mm |
Key specification differences stand out between these two: The Tudor Black Bay GMT S&G leads in water resistance (200m / 660ft vs. 50m / 165ft), and the Tudor Black Bay GMT S&G offers longer power reserve at 70 hours, and the Rolex GMT-Master uses Stainless steel while the Tudor Black Bay GMT S&G opts for Stainless steel and yellow gold. With 8 notable spec differences in total, the choice depends on which features matter most to your use case.
Value Per Feature
Per millimeter of case diameter, the Rolex GMT-Master costs $800 versus $128 for the Tudor Black Bay GMT S&G. For water resistance, the Tudor Black Bay GMT S&G delivers better value per meter of depth rating. The Tudor Black Bay GMT S&G offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Rolex GMT-Master if you value a lower entry price, stronger flip potential, better value retention. Go with the Tudor Black Bay GMT S&G if you prioritize the Tudor heritage. For pure investment potential, the Rolex GMT-Master has the edge based on current market data.
Frequently Asked Questions
Which is more affordable, the Rolex GMT-Master or the Tudor Black Bay GMT S&G?
The Tudor Black Bay GMT S&G is more accessible, priced at $5,825 compared to ~$32,000 (market value).
Which watch is a better investment?
Based on current market data, the Rolex GMT-Master has a higher flip potential score of 6/10, suggesting stronger investment returns. However, watch values can fluctuate based on market conditions.
Which holds its value better on the secondary market?
The Rolex GMT-Master currently trades at 0.0% below retail, indicating moderate value retention on the pre-owned market.
How do the Rolex GMT-Master and Tudor Black Bay GMT S&G compare in size?
The Rolex GMT-Master measures 40mm in diameter and 12.0mm thick, while the Tudor Black Bay GMT S&G is 41mm by 14.8mm. Water resistance differs too: 50m / 165ft versus 200m / 660ft.
What movements do these watches use?
The Rolex GMT-Master uses the Rolex calibre 1575 with 48 hours power reserve, while the Tudor Black Bay GMT S&G runs on the Tudor Calibre MT5652 offering 70 hours of power reserve.