Omega Seamaster Diver 300M vs Tudor Black Bay
Ref. 210.30.42.20.06.001 vs Ref. M79230B-0008
In the dive watch category, the Omega Seamaster Diver 300M and Tudor Black Bay go head to head — two of the most sought-after options from rival manufacturers. The Omega Seamaster Diver 300M at $5,700 and the Tudor Black Bay at $4,100 each bring unique strengths. Here's our detailed breakdown of how they compare on specs, pricing, and market value.
Price Comparison
Omega
Seamaster Diver 300M
Tudor
Black Bay
At retail, the Omega Seamaster Diver 300M is listed at $5,700 while the Tudor Black Bay comes in at $4,100. The Tudor Black Bay saves you $1,600 (39% less), a meaningful difference for most buyers. On the secondary market, the gap narrows: the Omega Seamaster Diver 300M trades around $4,560 and the Tudor Black Bay around $3,690, a difference of $870 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 Diver 300M | Tudor Black Bay |
|---|---|---|
| Case Diameter | 42mm | 41mm |
| Case Thickness | 13.56mm | 12.7mm |
| Case Material | Stainless steel | Stainless steel |
| Bezel | Grey 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 | 300m / 1000ft | 200m / 660ft |
| Movement | Omega Co-Axial Master Chronometer calibre 8800 | Tudor Calibre MT5602 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 55 hours | 70 hours |
| Bracelet/Strap | Stainless steel bracelet | Stainless steel with riveted-style links |
| Clasp | Folding clasp with diver extension | Folding clasp with safety catch and micro-adjustment |
| Lug Width | 20mm | 22mm |
Key specification differences stand out between these two: The Omega Seamaster Diver 300M leads in water resistance (300m / 1000ft 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 Diver 300M costs $109 versus $90 for the Tudor Black Bay. For water resistance, the Omega Seamaster Diver 300M 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 Diver 300M 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 Diver 300M or the Tudor Black Bay?
The Tudor Black Bay is more accessible, priced at $4,100 compared to $5,700.
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 Diver 300M and Tudor Black Bay compare in size?
The Omega Seamaster Diver 300M measures 42mm in diameter and 13.56mm thick, while the Tudor Black Bay is 41mm by 12.7mm. Water resistance differs too: 300m / 1000ft versus 200m / 660ft.
What movements do these watches use?
The Omega Seamaster Diver 300M uses the Omega Co-Axial Master Chronometer calibre 8800 with 55 hours power reserve, while the Tudor Black Bay runs on the Tudor Calibre MT5602 offering 70 hours of power reserve.