Omega Speedmaster Moonwatch Professional
Ref. 310.20.42.50.99.001
Rolex Lady-Datejust
Ref. M279135RBR-0001
Omega Speedmaster Moonwatch Professional vs Rolex Lady-Datejust
Ref. 310.20.42.50.99.001 vs Ref. M279135RBR-0001
Comparing the Omega Speedmaster Moonwatch Professional to the Rolex Lady-Datejust means weighing a significant price difference — is the premium justified? At $11,400 versus $35,150, these two watches serve different segments of the market. Here's how they stack up on specifications, value retention, and investment potential.
Price Comparison
Omega
Speedmaster Moonwatch Professional
Rolex
Lady-Datejust
At retail, the Omega Speedmaster Moonwatch Professional is listed at $11,400 while the Rolex Lady-Datejust comes in at $35,150. The Omega Speedmaster Moonwatch Professional comes in at $23,750 less — more than half the price difference — making it a significantly more accessible option. On the secondary market, the gap narrows: the Omega Speedmaster Moonwatch Professional trades around $9,690 and the Rolex Lady-Datejust around $33,393, a difference of $23,703 favoring the Omega Speedmaster Moonwatch Professional. Available at 15% below retail and trending downward, this represents a buying opportunity for those comfortable with the current market position. The Rolex Lady-Datejust commands an even stronger 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 2/10.
Specifications
| Specification | Omega Speedmaster Moonwatch Professional | Rolex Lady-Datejust |
|---|---|---|
| Case Diameter | 42mm | 28mm |
| Case Thickness | 13.18mm | 10.1mm |
| Case Material | Stainless steel and Sedna gold | 18ct Everose gold |
| Bezel | Sedna gold bezel ring with tachymetre scale | 18ct Everose gold, set with diamonds |
| Crystal | Sapphire crystal front and caseback | Sapphire with Cyclops lens |
| Water Resistance | 50m / 167ft | 100m / 330ft |
| Movement | Omega Co-Axial Master Chronometer calibre 3861 | Rolex calibre 2236 |
| Movement Type | Manual-winding | Automatic |
| Power Reserve | 50 hours | 55 hours |
| Bracelet/Strap | Stainless steel and Sedna gold bracelet | President, three-piece semi-circular links in 18ct Everose gold |
| Clasp | Adjustable clasp | Concealed folding Crownclasp |
| Lug Width | 20mm | 14mm |
Key specification differences stand out between these two: The Rolex Lady-Datejust leads in water resistance (100m / 330ft vs. 50m / 167ft), and the Rolex Lady-Datejust offers longer power reserve at 55 hours, and the Omega Speedmaster Moonwatch Professional uses Stainless steel and Sedna gold while the Rolex Lady-Datejust opts for 18ct Everose 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 Omega Speedmaster Moonwatch Professional costs $231 versus $1,193 for the Rolex Lady-Datejust. For water resistance, the Omega Speedmaster Moonwatch Professional delivers better value per meter of depth rating. The Omega Speedmaster Moonwatch Professional offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Omega Speedmaster Moonwatch Professional if you value a lower entry price, timing functionality. Go with the Rolex Lady-Datejust if you prioritize stronger flip potential, better value retention. For pure investment potential, the Rolex Lady-Datejust has the edge based on current market data.
Frequently Asked Questions
Which is more affordable, the Omega Speedmaster Moonwatch Professional or the Rolex Lady-Datejust?
The Omega Speedmaster Moonwatch Professional is more accessible, priced at $11,400 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 Rolex Lady-Datejust currently trades at 5.0% below retail, indicating moderate value retention on the pre-owned market.
How do the Omega Speedmaster Moonwatch Professional and Rolex Lady-Datejust compare in size?
The Omega Speedmaster Moonwatch Professional measures 42mm in diameter and 13.18mm thick, while the Rolex Lady-Datejust is 28mm by 10.1mm. Water resistance differs too: 50m / 167ft versus 100m / 330ft.
What movements do these watches use?
The Omega Speedmaster Moonwatch Professional uses the Omega Co-Axial Master Chronometer calibre 3861 with 50 hours power reserve, while the Rolex Lady-Datejust runs on the Rolex calibre 2236 offering 55 hours of power reserve.
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