Omega Speedmaster Dark Side of the Moon
Ref. 310.92.44.51.01.002
Rolex Lady-Datejust
Ref. M279135RBR-0010
Omega Speedmaster Dark Side of the Moon vs Rolex Lady-Datejust
Ref. 310.92.44.51.01.002 vs Ref. M279135RBR-0010
Comparing the Omega Speedmaster Dark Side of the Moon to the Rolex Lady-Datejust means weighing a significant price difference — is the premium justified? At $12,800 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 Dark Side of the Moon
Rolex
Lady-Datejust
At retail, the Omega Speedmaster Dark Side of the Moon is listed at $12,800 while the Rolex Lady-Datejust comes in at $35,150. The Omega Speedmaster Dark Side of the Moon comes in at $22,350 less — more than half the price difference — making it a significantly more accessible option. On the secondary market, the gap widens: the Omega Speedmaster Dark Side of the Moon trades around $10,500 and the Rolex Lady-Datejust around $33,393, a difference of $22,893 favoring the Omega Speedmaster Dark Side of the Moon. Available at 18% 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 Dark Side of the Moon | Rolex Lady-Datejust |
|---|---|---|
| Case Diameter | 44.25mm | 28mm |
| Case Thickness | 13.78mm | 10.1mm |
| Case Material | Black ceramic (ZrO2) | 18ct Everose gold |
| Bezel | Black ceramic 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 | Black coated nylon fabric strap | President, three-piece semi-circular links in 18ct Everose gold |
| Clasp | Ceramic buckle | Concealed folding Crownclasp |
| Lug Width | 21mm | 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 Dark Side of the Moon uses Black ceramic (ZrO2) 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 Dark Side of the Moon costs $237 versus $1,193 for the Rolex Lady-Datejust. For water resistance, the Omega Speedmaster Dark Side of the Moon delivers better value per meter of depth rating. The Omega Speedmaster Dark Side of the Moon offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Omega Speedmaster Dark Side of the Moon 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 Dark Side of the Moon or the Rolex Lady-Datejust?
The Omega Speedmaster Dark Side of the Moon is more accessible, priced at $12,800 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 Dark Side of the Moon and Rolex Lady-Datejust compare in size?
The Omega Speedmaster Dark Side of the Moon measures 44.25mm in diameter and 13.78mm 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 Dark Side of the Moon 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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