Omega Seamaster Planet Ocean 600M GMT
Ref. 215.30.44.22.01.001
Omega Speedmaster Moonwatch Professional
Ref. 310.20.42.50.02.001
Omega Seamaster Planet Ocean 600M GMT vs Omega Speedmaster Moonwatch Professional
Ref. 215.30.44.22.01.001 vs Ref. 310.20.42.50.02.001
The Omega Seamaster Planet Ocean 600M GMT and Omega Speedmaster Moonwatch Professional 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 Moonwatch Professional as a chronograph. At $8,050 and $10,600 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 Moonwatch Professional
At retail, the Omega Seamaster Planet Ocean 600M GMT is listed at $8,050 while the Omega Speedmaster Moonwatch Professional comes in at $10,600. The Omega Seamaster Planet Ocean 600M GMT saves you $2,550 (32% less), a meaningful difference for most buyers. On the secondary market, the gap widens: the Omega Seamaster Planet Ocean 600M GMT trades around $6,440 and the Omega Speedmaster Moonwatch Professional around $9,010, a difference of $2,570 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 Moonwatch Professional commands an even stronger market premium of -15.0%, 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 Moonwatch Professional |
|---|---|---|
| Case Diameter | 43.5mm | 42mm |
| Case Thickness | 14.71mm | 13.18mm |
| Case Material | Stainless steel | Stainless steel and Moonshine gold |
| Bezel | Black ceramic bidirectional rotating bezel with 24-hour scale | Moonshine gold 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 | Stainless steel and Moonshine gold bracelet |
| Clasp | Folding clasp with diver extension | Adjustable clasp |
| Lug Width | 21mm | 20mm |
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 Moonwatch Professional opts for Stainless steel and Moonshine 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 Seamaster Planet Ocean 600M GMT costs $148 versus $215 for the Omega Speedmaster Moonwatch Professional. 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 Moonwatch Professional 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 Moonwatch Professional?
The Omega Seamaster Planet Ocean 600M GMT is more accessible, priced at $8,050 compared to $10,600.
Which holds its value better on the secondary market?
The Omega Speedmaster Moonwatch Professional currently trades at 15.0% below retail, indicating moderate value retention on the pre-owned market.
How do the Omega Seamaster Planet Ocean 600M GMT and Omega Speedmaster Moonwatch Professional compare in size?
The Omega Seamaster Planet Ocean 600M GMT measures 43.5mm in diameter and 14.71mm thick, while the Omega Speedmaster Moonwatch Professional is 42mm by 13.18mm. 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 Moonwatch Professional runs on the Omega Co-Axial Master Chronometer calibre 3861 offering 50 hours of power reserve.
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