Omega Seamaster Planet Ocean 600M vs Tudor Black Bay
Ref. 215.30.44.21.03.001 vs Ref. M79210CNU-0001
In the dive watch category, the Omega Seamaster Planet Ocean 600M and Tudor Black Bay go head to head — two of the most sought-after options from rival manufacturers. The Omega Seamaster Planet Ocean 600M at $7,300 and the Tudor Black Bay at $3,700 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
Tudor
Black Bay
At retail, the Omega Seamaster Planet Ocean 600M is listed at $7,300 while the Tudor Black Bay comes in at $3,700. At $3,600 less (97% savings), the Tudor Black Bay offers a substantially lower entry point. On the secondary market, the gap narrows: the Omega Seamaster Planet Ocean 600M trades around $5,840 and the Tudor Black Bay around $3,330, a difference of $2,510 favoring the Tudor Black Bay. 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 commands an even stronger market premium of -10.0%, holding steady. 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 | Tudor Black Bay |
|---|---|---|
| Case Diameter | 43.5mm | 41mm |
| Case Thickness | 14.41mm | 12.7mm |
| Case Material | Stainless steel | Stainless steel |
| Bezel | Blue ceramic unidirectional rotating bezel with diving scale | Unidirectional rotating bezel with anodized aluminium insert in blue |
| Crystal | Domed sapphire crystal with anti-reflective treatment | Domed sapphire crystal |
| Water Resistance | 600m / 2000ft | 200m / 660ft |
| Movement | Omega Co-Axial Master Chronometer calibre 8900 | Tudor Calibre MT5602 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 55 hours | 70 hours |
| Bracelet/Strap | Stainless steel bracelet | Fabric NATO strap in blue |
| Clasp | Folding clasp with diver extension | Buckle |
| Lug Width | 21mm | 22mm |
Key specification differences stand out between these two: The Omega Seamaster Planet Ocean 600M leads in water resistance (600m / 2000ft vs. 200m / 660ft), and the Tudor Black Bay 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 costs $134 versus $81 for the Tudor Black Bay. For water resistance, the Omega Seamaster Planet Ocean 600M delivers better value per meter of depth rating. The Tudor Black Bay offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Omega Seamaster Planet Ocean 600M if you value serious diving capabilities. Go with the Tudor Black Bay if you prioritize a lower entry price, better value retention, serious diving capabilities.
Frequently Asked Questions
Which is more affordable, the Omega Seamaster Planet Ocean 600M or the Tudor Black Bay?
The Tudor Black Bay is more accessible, priced at $3,700 compared to $7,300.
Which holds its value better on the secondary market?
The Tudor Black Bay currently trades at 10.0% below retail, indicating moderate value retention on the pre-owned market.
How do the Omega Seamaster Planet Ocean 600M and Tudor Black Bay compare in size?
The Omega Seamaster Planet Ocean 600M measures 43.5mm in diameter and 14.41mm thick, while the Tudor Black Bay is 41mm by 12.7mm. Water resistance differs too: 600m / 2000ft versus 200m / 660ft.
What movements do these watches use?
The Omega Seamaster Planet Ocean 600M uses the Omega Co-Axial Master Chronometer calibre 8900 with 55 hours power reserve, while the Tudor Black Bay runs on the Tudor Calibre MT5602 offering 70 hours of power reserve.