Updated
Tudor Black Bay 58 vs Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic)
Tudor's diver meets Omega's chronograph
Quick Verdict
The Tudor Black Bay 58 ($2,500–$5,000) offers In-House Automatic Manufacture (Kenissi) precision in the tier below the Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) ($25,000+). The Black Bay 58 measures 39mm and is rated 200m (20 ATM). The Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) counters with Swiss Made craftsmanship and 600m (60 ATM), helium escape valve water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Tudor Black Bay 58 | Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) |
|---|---|---|
| Price | $2,500–$5,000 | $25,000+ |
| Case Size | 39mm | 43.5mm |
| Movement | Automatic Manufacture Calibre MT5402 | Automatic, Omega Co-Axial Master Chronometer Calibre 8901 |
| Caliber Type | In-House Automatic Manufacture (Kenissi) | Omega 8901, METAS Master Chronometer, anti-magnetic to 15,000 gauss |
| Power Reserve | 70 Hours | About 60 hours |
| Water Resistance | 200m (20 ATM) | 600m (60 ATM), helium escape valve |
| Crystal | Domed Sapphire | Sapphire Crystal, sapphire caseback |
| Case Material | 316L Stainless Steel | 18k Sedna gold |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Tudor's design language vs Omega's approach
The Tudor Black Bay 58 features a 316L Stainless Steel case at 39mm with Domed Sapphire protection. The Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) offers 18k Sedna gold construction at 43.5mm with Sapphire Crystal, sapphire caseback. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Manufacture Calibre MT5402 vs Automatic, Omega Co-Axial Master Chronometer Calibre 8901
The Black Bay 58 runs the Automatic Manufacture Calibre MT5402 (In-House Automatic Manufacture (Kenissi), 70 Hours power reserve) at 28,800 vph (4 Hz) frequency. The Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) uses the Automatic, Omega Co-Axial Master Chronometer Calibre 8901 (Omega 8901, METAS Master Chronometer, anti-magnetic to 15,000 gauss, About 60 hours reserve) at standard. The Black Bay 58 edges ahead on power reserve.
Wearability & Fit
39mm vs 43.5mm — different wrist presence
At 39mm, the Black Bay 58 wears more compactly on smaller wrists compared to the Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) at 43.5mm. Water resistance differs: 200m (20 ATM) vs 600m (60 ATM), helium escape valve.
Value & Cost of Ownership
Tudor sits in the lower tier
The Tudor Black Bay 58 sits at $2,500–$5,000 and the Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) at $25,000+. On the specs that outlast any price: the Black Bay 58 uses Domed Sapphire with 70 Hours, against Sapphire Crystal, sapphire caseback and About 60 hours on the Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic). Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 600m (60 ATM), helium escape valve
The Black Bay 58 is rated to 200m (20 ATM) while the Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) handles 600m (60 ATM), helium escape valve. The Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) offers superior water resistance.
Our Verdict
Tudor
Black Bay 58
Choose the Tudor Black Bay 58 if you prioritize In-House Automatic Manufacture (Kenissi) engineering, Swiss Made craftsmanship, and 200m (20 ATM) water resistance. At $2,500–$5,000, it delivers Automatic Manufacture Calibre MT5402 with 70 Hours power reserve.
View the dossierOmega
Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic)
Choose the Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) if you value Omega 8901, METAS Master Chronometer, anti-magnetic to 15,000 gauss technology, Swiss Made heritage, and 43.5mm proportions. At $25,000+, the Automatic, Omega Co-Axial Master Chronometer Calibre 8901 with About 60 hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Tudor Black Bay 58 and Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) represent two distinct approaches to fine watchmaking — the Tudor bringing Swiss Made tradition while Omega delivers Swiss Made engineering.
Frequently Asked Questions
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How This Page Was Made
Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.