Omega Seamaster Planet Ocean 600M GMT vs Tudor Black Bay GMT
Ref. 215.30.44.22.01.001 vs Ref. M79830RB-0001
In the gmt / travel watch category, the Omega Seamaster Planet Ocean 600M GMT and Tudor Black Bay GMT 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 Tudor Black Bay GMT at $4,600 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
Tudor
Black Bay GMT
At retail, the Omega Seamaster Planet Ocean 600M GMT is listed at $8,050 while the Tudor Black Bay GMT comes in at $4,600. At $3,450 less (75% savings), the Tudor Black Bay 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 Tudor Black Bay GMT around $3,800, a difference of $2,640 favoring the Tudor Black Bay GMT. Available at 20% below retail and trending downward, this represents a buying opportunity for those comfortable with the current market position. The Tudor Black Bay GMT commands an even stronger market premium of -17.4%, 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 | Tudor Black Bay GMT |
|---|---|---|
| Case Diameter | 43.5mm | 41mm |
| Case Thickness | 14.71mm | 14.8mm |
| Case Material | Stainless steel | Stainless steel |
| Bezel | Black ceramic bidirectional rotating bezel with 24-hour scale | Bidirectional rotating bezel with anodized aluminium insert in burgundy and blue |
| Crystal | Domed sapphire crystal with anti-reflective treatment | Sapphire crystal |
| Water Resistance | 600m / 2000ft | 200m / 660ft |
| Movement | Omega Co-Axial Master Chronometer calibre 8906 | Tudor Calibre MT5652 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 55 hours | 70 hours |
| Bracelet/Strap | Stainless steel bracelet | Stainless steel with riveted-style links |
| Clasp | Folding clasp with diver extension | Folding clasp with safety catch |
| Lug Width | 21mm | 22mm |
Key specification differences stand out between these two: The Omega Seamaster Planet Ocean 600M GMT leads in water resistance (600m / 2000ft vs. 200m / 660ft), and the Tudor Black Bay GMT offers longer power reserve at 70 hours. With 7 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 $93 for the Tudor Black Bay GMT. For water resistance, the Omega Seamaster Planet Ocean 600M GMT delivers better value per meter of depth rating. The Tudor Black Bay GMT offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Omega Seamaster Planet Ocean 600M GMT if you value the Omega heritage. Go with the Tudor Black Bay GMT if you prioritize a lower entry price, better value retention.
Frequently Asked Questions
Which is more affordable, the Omega Seamaster Planet Ocean 600M GMT or the Tudor Black Bay GMT?
The Tudor Black Bay GMT is more accessible, priced at $4,600 compared to $8,050.
Which holds its value better on the secondary market?
The Tudor Black Bay GMT currently trades at 17.4% below retail, indicating moderate value retention on the pre-owned market.
How do the Omega Seamaster Planet Ocean 600M GMT and Tudor Black Bay GMT compare in size?
The Omega Seamaster Planet Ocean 600M GMT measures 43.5mm in diameter and 14.71mm thick, while the Tudor Black Bay GMT is 41mm by 14.8mm. Water resistance differs too: 600m / 2000ft versus 200m / 660ft.
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 Tudor Black Bay GMT runs on the Tudor Calibre MT5652 offering 70 hours of power reserve.
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