Omega Seamaster Planet Ocean 600M GMT vs Rolex GMT-Master II
Ref. 215.30.44.22.01.001 vs Ref. 126710BLRO
In the gmt / travel watch category, the Omega Seamaster Planet Ocean 600M GMT and Rolex GMT-Master II go head to head — two of the most sought-after options from rival manufacturers. The Omega Seamaster Planet Ocean 600M GMT at $8,050 and the Rolex GMT-Master II at $12,350 each bring unique strengths. Here's our detailed breakdown of how they compare on specs, pricing, and market value.
Price Comparison
Omega
Seamaster Planet Ocean 600M GMT
Rolex
GMT-Master II
At retail, the Omega Seamaster Planet Ocean 600M GMT is listed at $8,050 while the Rolex GMT-Master II comes in at $12,350. At $4,300 less (53% savings), the Omega Seamaster Planet Ocean 600M GMT offers a substantially lower entry point. On the secondary market, the gap widens: the Omega Seamaster Planet Ocean 600M GMT trades around $6,440 and the Rolex GMT-Master II around $20,500, a difference of $14,060 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 Rolex GMT-Master II commands an even stronger market premium of +66.0%, with upward momentum. For investors, the Rolex GMT-Master II edges ahead with a flip potential score of 8/10 compared to 2/10.
Specifications
| Specification | Omega Seamaster Planet Ocean 600M GMT | Rolex GMT-Master II |
|---|---|---|
| Case Diameter | 43.5mm | 40mm |
| Case Thickness | 14.71mm | 13.1mm |
| Case Material | Stainless steel | Oystersteel |
| Bezel | Black ceramic bidirectional rotating bezel with 24-hour scale | Cerachrom (ceramic) in blue and red |
| Crystal | Domed sapphire crystal with anti-reflective treatment | Sapphire with Cyclops lens |
| Water Resistance | 600m / 2000ft | 100m / 330ft |
| Movement | Omega Co-Axial Master Chronometer calibre 8906 | Rolex calibre 3285 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 55 hours | 70 hours |
| Bracelet/Strap | Stainless steel bracelet | Jubilee, five-piece links |
| Clasp | Folding clasp with diver extension | Oysterclasp with Easylink 5mm comfort extension |
| 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. 100m / 330ft), and the Rolex GMT-Master II offers longer power reserve at 70 hours, and the Omega Seamaster Planet Ocean 600M GMT uses Stainless steel while the Rolex GMT-Master II opts for Oystersteel. 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 $513 for the Rolex GMT-Master II. 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 Rolex GMT-Master II if you prioritize stronger flip potential, better value retention. For pure investment potential, the Rolex GMT-Master II has the edge based on current market data.
Frequently Asked Questions
Which is more affordable, the Omega Seamaster Planet Ocean 600M GMT or the Rolex GMT-Master II?
The Omega Seamaster Planet Ocean 600M GMT is more accessible, priced at $8,050 compared to $12,350.
Which watch is a better investment?
Based on current market data, the Rolex GMT-Master II has a higher flip potential score of 8/10, suggesting stronger investment returns. However, watch values can fluctuate based on market conditions.
Which holds its value better on the secondary market?
The Rolex GMT-Master II currently trades at 66.0% above retail, indicating strong value retention on the pre-owned market.
How do the Omega Seamaster Planet Ocean 600M GMT and Rolex GMT-Master II compare in size?
The Omega Seamaster Planet Ocean 600M GMT measures 43.5mm in diameter and 14.71mm thick, while the Rolex GMT-Master II is 40mm by 13.1mm. Water resistance differs too: 600m / 2000ft versus 100m / 330ft.
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 Rolex GMT-Master II runs on the Rolex calibre 3285 offering 70 hours of power reserve.
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