Omega Seamaster Planet Ocean 600M vs Rolex Datejust 31
Ref. 2201.50.00 vs Ref. M278274-0018
Comparing the Omega Seamaster Planet Ocean 600M to the Rolex Datejust 31 means weighing a significant price difference — is the premium justified? At ~$4,000 (market value) versus $10,750, these two watches serve different segments of the market. Here's how they stack up on specifications, value retention, and investment potential.
Price Comparison
Omega
Seamaster Planet Ocean 600M
Rolex
Datejust 31
The Omega Seamaster Planet Ocean 600M is priced at ~$4,000 (market value) while the Rolex Datejust 31 comes in at $10,750. On the secondary market, the gap narrows: the Omega Seamaster Planet Ocean 600M trades around $4,000 and the Rolex Datejust 31 around $10,000, a difference of $6,000 favoring the Omega Seamaster Planet Ocean 600M. Available at 13% below retail and trending upward, this represents a buying opportunity for those comfortable with the current market position. The Rolex Datejust 31 commands an even stronger market premium of -7.0%, holding steady. Both watches score equally on flip potential at 3/10, making neither a clear investment winner over the other.
Specifications
| Specification | Omega Seamaster Planet Ocean 600M | Rolex Datejust 31 |
|---|---|---|
| Case Diameter | 42mm | 31mm |
| Case Thickness | 14.5mm | 11.3mm |
| Case Material | Stainless steel | Oystersteel and 18ct white gold |
| Bezel | Black unidirectional rotating bezel with diving scale | 18ct white gold, fluted |
| Crystal | Sapphire crystal with anti-reflective treatment | Sapphire with Cyclops lens |
| Water Resistance | 600m / 2000ft | 100m / 330ft |
| Movement | Omega Co-Axial calibre 2500 | Rolex calibre 2236 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 48 hours | 55 hours |
| Bracelet/Strap | Stainless steel bracelet | Jubilee, five-piece links |
| Clasp | Folding clasp with diver extension | Oysterclasp with Easylink 5mm comfort extension |
| Lug Width | 20mm | 16mm |
Key specification differences stand out between these two: The Omega Seamaster Planet Ocean 600M leads in water resistance (600m / 2000ft vs. 100m / 330ft), and the Rolex Datejust 31 offers longer power reserve at 55 hours, and the Omega Seamaster Planet Ocean 600M uses Stainless steel while the Rolex Datejust 31 opts for Oystersteel and 18ct white 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 costs $95 versus $323 for the Rolex Datejust 31. For water resistance, the Omega Seamaster Planet Ocean 600M delivers better value per meter of depth rating. The Omega Seamaster Planet Ocean 600M offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Omega Seamaster Planet Ocean 600M if you value a lower entry price, serious diving capabilities. Go with the Rolex Datejust 31 if you prioritize better value retention.
Frequently Asked Questions
Which is more affordable, the Omega Seamaster Planet Ocean 600M or the Rolex Datejust 31?
The Omega Seamaster Planet Ocean 600M is more accessible, priced at ~$4,000 (market value) compared to $10,750.
Which holds its value better on the secondary market?
The Rolex Datejust 31 currently trades at 7.0% below retail, indicating moderate value retention on the pre-owned market.
How do the Omega Seamaster Planet Ocean 600M and Rolex Datejust 31 compare in size?
The Omega Seamaster Planet Ocean 600M measures 42mm in diameter and 14.5mm thick, while the Rolex Datejust 31 is 31mm by 11.3mm. Water resistance differs too: 600m / 2000ft versus 100m / 330ft.
What movements do these watches use?
The Omega Seamaster Planet Ocean 600M uses the Omega Co-Axial calibre 2500 with 48 hours power reserve, while the Rolex Datejust 31 runs on the Rolex calibre 2236 offering 55 hours of power reserve.