Omega Seamaster Planet Ocean 600M GMT
Ref. 215.30.44.22.01.001
Omega Speedmaster Dark Side of the Moon
Ref. 310.92.44.51.01.002
Omega Seamaster Planet Ocean 600M GMT vs Omega Speedmaster Dark Side of the Moon
Ref. 215.30.44.22.01.001 vs Ref. 310.92.44.51.01.002
The Omega Seamaster Planet Ocean 600M GMT and Omega Speedmaster Dark Side of the Moon both carry the Omega name but serve different purposes — the Omega Seamaster Planet Ocean 600M GMT as a gmt / travel watch and the Omega Speedmaster Dark Side of the Moon as a chronograph. At $8,050 and $12,800 respectively, the question isn't which is better — it's which better fits your collection and investment goals.
Price Comparison
Omega
Seamaster Planet Ocean 600M GMT
Omega
Speedmaster Dark Side of the Moon
At retail, the Omega Seamaster Planet Ocean 600M GMT is listed at $8,050 while the Omega Speedmaster Dark Side of the Moon comes in at $12,800. At $4,750 less (59% savings), the Omega Seamaster Planet Ocean 600M GMT offers a substantially lower entry point. On the secondary market, the gap narrows: the Omega Seamaster Planet Ocean 600M GMT trades around $6,440 and the Omega Speedmaster Dark Side of the Moon around $10,500, a difference of $4,060 favoring the Omega Seamaster Planet Ocean 600M GMT. Available at 20% below retail and trending downward, this represents a buying opportunity for those comfortable with the current market position. The Omega Speedmaster Dark Side of the Moon commands an even stronger market premium of -18.0%, though currently trending downward. Both watches score equally on flip potential at 2/10, making neither a clear investment winner over the other.
Specifications
| Specification | Omega Seamaster Planet Ocean 600M GMT | Omega Speedmaster Dark Side of the Moon |
|---|---|---|
| Case Diameter | 43.5mm | 44.25mm |
| Case Thickness | 14.71mm | 13.78mm |
| Case Material | Stainless steel | Black ceramic (ZrO2) |
| Bezel | Black ceramic bidirectional rotating bezel with 24-hour scale | Black ceramic bezel ring with tachymetre scale |
| Crystal | Domed sapphire crystal with anti-reflective treatment | Sapphire crystal front and caseback |
| Water Resistance | 600m / 2000ft | 50m / 167ft |
| Movement | Omega Co-Axial Master Chronometer calibre 8906 | Omega Co-Axial Master Chronometer calibre 3861 |
| Movement Type | Automatic | Manual-winding |
| Power Reserve | 55 hours | 50 hours |
| Bracelet/Strap | Stainless steel bracelet | Black coated nylon fabric strap |
| Clasp | Folding clasp with diver extension | Ceramic buckle |
| Lug Width | 21mm | 21mm |
Key specification differences stand out between these two: The Omega Seamaster Planet Ocean 600M GMT leads in water resistance (600m / 2000ft vs. 50m / 167ft), and the Omega Seamaster Planet Ocean 600M GMT offers longer power reserve at 55 hours, and the Omega Seamaster Planet Ocean 600M GMT uses Stainless steel while the Omega Speedmaster Dark Side of the Moon opts for Black ceramic (ZrO2). 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 Seamaster Planet Ocean 600M GMT costs $148 versus $237 for the Omega Speedmaster Dark Side of the Moon. For water resistance, the Omega Seamaster Planet Ocean 600M GMT delivers better value per meter of depth rating. The Omega Seamaster Planet Ocean 600M GMT offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Omega Seamaster Planet Ocean 600M GMT if you value a lower entry price. Go with the Omega Speedmaster Dark Side of the Moon if you prioritize better value retention, timing functionality.
Frequently Asked Questions
Which is more affordable, the Omega Seamaster Planet Ocean 600M GMT or the Omega Speedmaster Dark Side of the Moon?
The Omega Seamaster Planet Ocean 600M GMT is more accessible, priced at $8,050 compared to $12,800.
Which holds its value better on the secondary market?
The Omega Speedmaster Dark Side of the Moon currently trades at 18.0% below retail, indicating moderate value retention on the pre-owned market.
How do the Omega Seamaster Planet Ocean 600M GMT and Omega Speedmaster Dark Side of the Moon compare in size?
The Omega Seamaster Planet Ocean 600M GMT measures 43.5mm in diameter and 14.71mm thick, while the Omega Speedmaster Dark Side of the Moon is 44.25mm by 13.78mm. Water resistance differs too: 600m / 2000ft versus 50m / 167ft.
What movements do these watches use?
The Omega Seamaster Planet Ocean 600M GMT uses the Omega Co-Axial Master Chronometer calibre 8906 with 55 hours power reserve, while the Omega Speedmaster Dark Side of the Moon runs on the Omega Co-Axial Master Chronometer calibre 3861 offering 50 hours of power reserve.
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