Tudor Black Bay 58 S&G vs Tudor Black Bay GMT
Ref. M79010SG-0001 vs Ref. M79830RB-0010
The Tudor Black Bay 58 S&G and Tudor Black Bay GMT both carry the Tudor name but serve different purposes — the Tudor Black Bay 58 S&G as a dive watch and the Tudor Black Bay GMT as a gmt / travel watch. At $5,525 and $4,150 respectively, the question isn't which is better — it's which better fits your collection and investment goals.
Price Comparison
Tudor
Black Bay 58 S&G
Tudor
Black Bay GMT
At retail, the Tudor Black Bay 58 S&G is listed at $5,525 while the Tudor Black Bay GMT comes in at $4,150. The Tudor Black Bay GMT saves you $1,375 (33% less), a meaningful difference for most buyers. On the secondary market, the gap widens: the Tudor Black Bay 58 S&G trades around $5,525 and the Tudor Black Bay GMT around $3,735, a difference of $1,790 favoring the Tudor Black Bay GMT. Currently holding steady at just 0% below retail, this watch retains most of its value on the secondary market. The Tudor Black Bay GMT shows a more modest market premium of -10.0%, holding steady. For investors, the Tudor Black Bay 58 S&G edges ahead with a flip potential score of 3/10 compared to 2/10.
Specifications
| Specification | Tudor Black Bay 58 S&G | Tudor Black Bay GMT |
|---|---|---|
| Case Diameter | 39mm | 41mm |
| Case Thickness | 11.9mm | 14.8mm |
| Case Material | Stainless steel and yellow gold | Stainless steel |
| Bezel | Unidirectional rotating bezel with anodized aluminium insert in brown | Bidirectional rotating bezel with anodized aluminium insert in burgundy and blue |
| Crystal | Sapphire crystal | Sapphire crystal |
| Water Resistance | 200m / 660ft | 200m / 660ft |
| Movement | Tudor Calibre MT5402 | Tudor Calibre MT5652 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 70 hours | 70 hours |
| Bracelet/Strap | Stainless steel and yellow gold with riveted-style links | Fabric NATO strap in burgundy and blue |
| Clasp | Folding clasp with safety catch | Buckle |
| Lug Width | 20mm | 22mm |
Key specification differences stand out between these two: the Tudor Black Bay 58 S&G uses Stainless steel and yellow gold while the Tudor Black Bay GMT opts for Stainless steel. With 5 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 Tudor Black Bay 58 S&G costs $142 versus $91 for the Tudor Black Bay GMT. For water resistance, the Tudor Black Bay GMT delivers better value per meter of depth rating. The Tudor Black Bay GMT offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Tudor Black Bay 58 S&G if you value stronger flip potential, better value retention, serious diving capabilities. Go with the Tudor Black Bay GMT if you prioritize a lower entry price. For pure investment potential, the Tudor Black Bay 58 S&G has the edge based on current market data.
Frequently Asked Questions
Which is more affordable, the Tudor Black Bay 58 S&G or the Tudor Black Bay GMT?
The Tudor Black Bay GMT is more accessible, priced at $4,150 compared to $5,525.
Which watch is a better investment?
Based on current market data, the Tudor Black Bay 58 S&G has a higher flip potential score of 3/10, suggesting stronger investment returns. However, watch values can fluctuate based on market conditions.
Which holds its value better on the secondary market?
The Tudor Black Bay 58 S&G currently trades at 0.0% below retail, indicating moderate value retention on the pre-owned market.
How do the Tudor Black Bay 58 S&G and Tudor Black Bay GMT compare in size?
The Tudor Black Bay 58 S&G measures 39mm in diameter and 11.9mm thick, while the Tudor Black Bay GMT is 41mm by 14.8mm.
What movements do these watches use?
The Tudor Black Bay 58 S&G uses the Tudor Calibre MT5402 with 70 hours power reserve, while the Tudor Black Bay GMT runs on the Tudor Calibre MT5652 offering 70 hours of power reserve.

