Omega Seamaster Diver 300M vs Rolex GMT-Master II
Ref. 2531.80.00 vs Ref. 116710LN
Comparing the Rolex GMT-Master II to the Omega Seamaster Diver 300M means weighing a significant price difference — is the premium justified? At ~$3,800 (market value) versus ~$15,000 (market value), 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 Diver 300M
Rolex
GMT-Master II
The Omega Seamaster Diver 300M is priced at ~$3,800 (market value) while the Rolex GMT-Master II comes in at ~$15,000 (market value). On the secondary market, the gap widens: the Omega Seamaster Diver 300M trades around $3,800 and the Rolex GMT-Master II around $15,000, a difference of $11,200 favoring the Omega Seamaster Diver 300M. This watch trades at 36% above retail on the secondary market and is trending upward — a strong indicator of collector demand. The Rolex GMT-Master II commands an even stronger market premium of +62.2%, with upward momentum. For investors, the Rolex GMT-Master II edges ahead with a flip potential score of 9/10 compared to 6/10.
Specifications
| Specification | Omega Seamaster Diver 300M | Rolex GMT-Master II |
|---|---|---|
| Case Diameter | 41mm | 40mm |
| Case Thickness | 12mm | 13.0mm |
| Case Material | Stainless steel | Oystersteel |
| Bezel | Blue unidirectional rotating bezel with diving scale | Cerachrom (ceramic) in black |
| Crystal | Sapphire crystal with anti-reflective treatment | Sapphire with Cyclops lens |
| Water Resistance | 300m / 1000ft | 100m / 330ft |
| Movement | Omega calibre 1120 (base ETA 2892-A2) | Rolex calibre 3186 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 44 hours | 48 hours |
| Bracelet/Strap | Stainless steel bracelet | Oyster, three-piece solid links |
| Clasp | Folding clasp with diver extension | Oysterclasp with Easylink 5mm comfort extension |
| Lug Width | 20mm | 20mm |
Key specification differences stand out between these two: The Omega Seamaster Diver 300M leads in water resistance (300m / 1000ft vs. 100m / 330ft), and the Rolex GMT-Master II offers longer power reserve at 48 hours, and the Omega Seamaster Diver 300M 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 Diver 300M costs $93 versus $375 for the Rolex GMT-Master II. For water resistance, the Omega Seamaster Diver 300M delivers better value per meter of depth rating. The Omega Seamaster Diver 300M offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Omega Seamaster Diver 300M if you value 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 Diver 300M or the Rolex GMT-Master II?
The Omega Seamaster Diver 300M is more accessible, priced at ~$3,800 (market value) compared to ~$15,000 (market value).
Which watch is a better investment?
Based on current market data, the Rolex GMT-Master II has a higher flip potential score of 9/10, 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 62.2% above retail, indicating strong value retention on the pre-owned market.
How do the Omega Seamaster Diver 300M and Rolex GMT-Master II compare in size?
The Omega Seamaster Diver 300M measures 41mm in diameter and 12mm thick, while the Rolex GMT-Master II is 40mm by 13.0mm. Water resistance differs too: 300m / 1000ft versus 100m / 330ft.
What movements do these watches use?
The Omega Seamaster Diver 300M uses the Omega calibre 1120 (base ETA 2892-A2) with 44 hours power reserve, while the Rolex GMT-Master II runs on the Rolex calibre 3186 offering 48 hours of power reserve.