Rolex Lady-Datejust vs Tudor Black Bay Chrono S&G
Ref. M279135RBR-0010 vs Ref. M79363N-0002
The Rolex Lady-Datejust and Tudor Black Bay Chrono 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 Lady-Datejust priced at $35,150 and the Tudor Black Bay Chrono S&G at $7,300, 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
Lady-Datejust
Tudor
Black Bay Chrono S&G
At retail, the Rolex Lady-Datejust is listed at $35,150 while the Tudor Black Bay Chrono S&G comes in at $7,300. The Tudor Black Bay Chrono S&G comes in at $27,850 less — more than half the price difference — making it a significantly more accessible option. On the secondary market, the gap narrows: the Rolex Lady-Datejust trades around $33,393 and the Tudor Black Bay Chrono S&G around $6,935, a difference of $26,458 favoring the Tudor Black Bay Chrono S&G. Currently holding steady at just 5% below retail, this watch retains most of its value on the secondary market. The Tudor Black Bay Chrono S&G shows a more modest market premium of -5.0%, holding steady. For investors, the Rolex Lady-Datejust edges ahead with a flip potential score of 4/10 compared to 3/10.
Specifications
| Specification | Rolex Lady-Datejust | Tudor Black Bay Chrono S&G |
|---|---|---|
| Case Diameter | 28mm | 41mm |
| Case Thickness | 10.1mm | 14.4mm |
| Case Material | 18ct Everose gold | Stainless steel and yellow gold |
| Bezel | 18ct Everose gold, set with diamonds | Fixed bezel with tachymeter scale in yellow gold |
| Crystal | Sapphire with Cyclops lens | Sapphire crystal |
| Water Resistance | 100m / 330ft | 200m / 660ft |
| Movement | Rolex calibre 2236 | Tudor Calibre MT5813 |
| Movement Type | Automatic | Automatic chronograph |
| Power Reserve | 55 hours | 70 hours |
| Bracelet/Strap | President, three-piece semi-circular links in 18ct Everose gold | Stainless steel and yellow gold with riveted-style links |
| Clasp | Concealed folding Crownclasp | Folding clasp with safety catch |
| Lug Width | 14mm | 22mm |
Key specification differences stand out between these two: The Tudor Black Bay Chrono S&G leads in water resistance (200m / 660ft vs. 100m / 330ft), and the Tudor Black Bay Chrono S&G offers longer power reserve at 70 hours, and the Rolex Lady-Datejust uses 18ct Everose gold while the Tudor Black Bay Chrono 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 Lady-Datejust costs $1,193 versus $169 for the Tudor Black Bay Chrono S&G. For water resistance, the Tudor Black Bay Chrono S&G delivers better value per meter of depth rating. The Tudor Black Bay Chrono S&G offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Rolex Lady-Datejust if you value stronger flip potential. Go with the Tudor Black Bay Chrono S&G if you prioritize a lower entry price, timing functionality. For pure investment potential, the Rolex Lady-Datejust has the edge based on current market data.
Frequently Asked Questions
Which is more affordable, the Rolex Lady-Datejust or the Tudor Black Bay Chrono S&G?
The Tudor Black Bay Chrono S&G is more accessible, priced at $7,300 compared to $35,150.
Which watch is a better investment?
Based on current market data, the Rolex Lady-Datejust has a higher flip potential score of 4/10, 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 Chrono S&G currently trades at 5.0% below retail, indicating moderate value retention on the pre-owned market.
How do the Rolex Lady-Datejust and Tudor Black Bay Chrono S&G compare in size?
The Rolex Lady-Datejust measures 28mm in diameter and 10.1mm thick, while the Tudor Black Bay Chrono S&G is 41mm by 14.4mm. Water resistance differs too: 100m / 330ft versus 200m / 660ft.
What movements do these watches use?
The Rolex Lady-Datejust uses the Rolex calibre 2236 with 55 hours power reserve, while the Tudor Black Bay Chrono S&G runs on the Tudor Calibre MT5813 offering 70 hours of power reserve.