Omega Seamaster Diver 300M vs Rolex GMT-Master II
Ref. 2254.50.00 vs Ref. 16710
Comparing the Rolex GMT-Master II to the Omega Seamaster Diver 300M means weighing a significant price difference — is the premium justified? At ~$4,000 (market value) versus ~$17,000 (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 ~$4,000 (market value) while the Rolex GMT-Master II comes in at ~$17,000 (market value). On the secondary market, the gap widens: the Omega Seamaster Diver 300M trades around $4,000 and the Rolex GMT-Master II around $17,000, a difference of $13,000 favoring the Omega Seamaster Diver 300M. This watch trades at 25% above retail on the secondary market and is trending upward — a strong indicator of collector demand. The Rolex GMT-Master II shows a more modest market premium of 0.0%, with upward momentum. Both watches score equally on flip potential at 6/10, making neither a clear investment winner over the other.
Specifications
| Specification | Omega Seamaster Diver 300M | Rolex GMT-Master II |
|---|---|---|
| Case Diameter | 41mm | 40mm |
| Case Thickness | 12mm | 12.0mm |
| Case Material | Stainless steel | Stainless steel |
| Bezel | Stainless steel unidirectional rotating bezel with diving scale | Stainless steel with aluminum insert (blue/red, black/red, or 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 3185 |
| 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. 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 Diver 300M costs $98 versus $425 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 better value retention, serious diving capabilities. Go with the Rolex GMT-Master II if you prioritize the Rolex heritage.
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 ~$4,000 (market value) compared to ~$17,000 (market value).
Which holds its value better on the secondary market?
The Omega Seamaster Diver 300M currently trades at 25.0% 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 12.0mm. 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 3185 offering 48 hours of power reserve.