Rolex Sky-Dweller vs Tudor Black Bay S&G
Ref. 336934 vs Ref. M79733N-0007
The Rolex Sky-Dweller and Tudor Black Bay 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 Sky-Dweller priced at $17,150 and the Tudor Black Bay S&G at $5,475, 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
Sky-Dweller
Tudor
Black Bay S&G
At retail, the Rolex Sky-Dweller is listed at $17,150 while the Tudor Black Bay S&G comes in at $5,475. The Tudor Black Bay S&G comes in at $11,675 less — more than half the price difference — making it a significantly more accessible option. On the secondary market, the gap widens: the Rolex Sky-Dweller trades around $19,000 and the Tudor Black Bay S&G around $4,928, a difference of $14,072 favoring the Tudor Black Bay S&G. Trading at 11% above retail and holding steady, this model holds its value well on the pre-owned market. The Tudor Black Bay S&G shows a more modest market premium of -10.0%, holding steady. For investors, the Rolex Sky-Dweller edges ahead with a flip potential score of 5/10 compared to 2/10.
Specifications
| Specification | Rolex Sky-Dweller | Tudor Black Bay S&G |
|---|---|---|
| Case Diameter | 42mm | 41mm |
| Case Thickness | 14.1mm | 12.7mm |
| Case Material | Oystersteel and 18ct white gold | Stainless steel and yellow gold |
| Bezel | 18ct white gold, fluted, with Ring Command bezel | Unidirectional rotating bezel with anodized aluminium insert in black |
| Crystal | Sapphire with Cyclops lens | Domed sapphire crystal |
| Water Resistance | 100m / 330ft | 200m / 660ft |
| Movement | Rolex calibre 9001 | Tudor Calibre MT5612 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 72 hours | 70 hours |
| Bracelet/Strap | Jubilee, five-piece links | Stainless steel and yellow gold with riveted-style links |
| Clasp | Oysterclasp with Easylink 5mm comfort extension | Folding clasp with safety catch |
| Lug Width | 21mm | 22mm |
Key specification differences stand out between these two: The Tudor Black Bay S&G leads in water resistance (200m / 660ft vs. 100m / 330ft), and the Rolex Sky-Dweller offers longer power reserve at 72 hours, and the Rolex Sky-Dweller uses Oystersteel and 18ct white gold while the Tudor Black Bay 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 Sky-Dweller costs $452 versus $120 for the Tudor Black Bay S&G. For water resistance, the Tudor Black Bay S&G delivers better value per meter of depth rating. The Tudor Black Bay S&G offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Rolex Sky-Dweller if you value stronger flip potential, better value retention. Go with the Tudor Black Bay S&G if you prioritize a lower entry price, serious diving capabilities. For pure investment potential, the Rolex Sky-Dweller has the edge based on current market data.
Frequently Asked Questions
Which is more affordable, the Rolex Sky-Dweller or the Tudor Black Bay S&G?
The Tudor Black Bay S&G is more accessible, priced at $5,475 compared to $17,150.
Which watch is a better investment?
Based on current market data, the Rolex Sky-Dweller has a higher flip potential score of 5/10, suggesting stronger investment returns. However, watch values can fluctuate based on market conditions.
Which holds its value better on the secondary market?
The Rolex Sky-Dweller currently trades at 10.8% above retail, indicating strong value retention on the pre-owned market.
How do the Rolex Sky-Dweller and Tudor Black Bay S&G compare in size?
The Rolex Sky-Dweller measures 42mm in diameter and 14.1mm thick, while the Tudor Black Bay S&G is 41mm by 12.7mm. Water resistance differs too: 100m / 330ft versus 200m / 660ft.
What movements do these watches use?
The Rolex Sky-Dweller uses the Rolex calibre 9001 with 72 hours power reserve, while the Tudor Black Bay S&G runs on the Tudor Calibre MT5612 offering 70 hours of power reserve.