Omega Seamaster Aqua Terra 150M vs Rolex GMT-Master II
Ref. 220.10.38.20.03.001 vs Ref. M126710GRNR-0004
Comparing the Omega Seamaster Aqua Terra 150M to the Rolex GMT-Master II means weighing a significant price difference — is the premium justified? At $5,500 versus $12,350, 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 Aqua Terra 150M
Rolex
GMT-Master II
At retail, the Omega Seamaster Aqua Terra 150M is listed at $5,500 while the Rolex GMT-Master II comes in at $12,350. The Omega Seamaster Aqua Terra 150M comes in at $6,850 less — more than half the price difference — making it a significantly more accessible option. On the secondary market, the gap widens: the Omega Seamaster Aqua Terra 150M trades around $4,400 and the Rolex GMT-Master II around $17,500, a difference of $13,100 favoring the Omega Seamaster Aqua Terra 150M. 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 +41.7%, with upward momentum. For investors, the Rolex GMT-Master II edges ahead with a flip potential score of 7/10 compared to 2/10.
Specifications
| Specification | Omega Seamaster Aqua Terra 150M | Rolex GMT-Master II |
|---|---|---|
| Case Diameter | 38mm | 40mm |
| Case Thickness | 12.73mm | 13.1mm |
| Case Material | Stainless steel | Oystersteel |
| Bezel | Stainless steel bezel | Cerachrom (ceramic) in green and black |
| Crystal | Domed sapphire crystal with anti-reflective treatment | Sapphire with Cyclops lens |
| Water Resistance | 150m / 500ft | 100m / 330ft |
| Movement | Omega Co-Axial Master Chronometer calibre 8800 | 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 | Oysterclasp with Easylink 5mm comfort extension |
| Lug Width | 19mm | 20mm |
Key specification differences stand out between these two: The Omega Seamaster Aqua Terra 150M leads in water resistance (150m / 500ft vs. 100m / 330ft), and the Rolex GMT-Master II offers longer power reserve at 70 hours, and the Omega Seamaster Aqua Terra 150M 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 Aqua Terra 150M costs $116 versus $438 for the Rolex GMT-Master II. For water resistance, the Omega Seamaster Aqua Terra 150M delivers better value per meter of depth rating. The Omega Seamaster Aqua Terra 150M offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Omega Seamaster Aqua Terra 150M if you value a lower entry price, serious diving capabilities. 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 Aqua Terra 150M or the Rolex GMT-Master II?
The Omega Seamaster Aqua Terra 150M is more accessible, priced at $5,500 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 7/10, 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 41.7% above retail, indicating strong value retention on the pre-owned market.
How do the Omega Seamaster Aqua Terra 150M and Rolex GMT-Master II compare in size?
The Omega Seamaster Aqua Terra 150M measures 38mm in diameter and 12.73mm thick, while the Rolex GMT-Master II is 40mm by 13.1mm. Water resistance differs too: 150m / 500ft versus 100m / 330ft.
What movements do these watches use?
The Omega Seamaster Aqua Terra 150M uses the Omega Co-Axial Master Chronometer calibre 8800 with 55 hours power reserve, while the Rolex GMT-Master II runs on the Rolex calibre 3285 offering 70 hours of power reserve.