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Blancpain Fifty Fathoms 45mm (titanium, blue dial) vs Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic)
Blancpain's diver meets Omega's chronograph
Quick Verdict
The Blancpain Fifty Fathoms 45mm (titanium, blue dial) ($10,000–$25,000) offers Blancpain 1315, three barrels, silicon balance spring precision in the tier below the Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) ($25,000+). The Fifty Fathoms 45mm (titanium, blue dial) measures 45mm and is rated 300m (30 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 | Blancpain Fifty Fathoms 45mm (titanium, blue dial) | Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) |
|---|---|---|
| Price | $10,000–$25,000 | $25,000+ |
| Case Size | 45mm | 43.5mm |
| Movement | Automatic, Blancpain Calibre 1315 | Automatic, Omega Co-Axial Master Chronometer Calibre 8901 |
| Caliber Type | Blancpain 1315, three barrels, silicon balance spring | Omega 8901, METAS Master Chronometer, anti-magnetic to 15,000 gauss |
| Power Reserve | About 120 hours (five days) | About 60 hours |
| Water Resistance | 300m (30 ATM) | 600m (60 ATM), helium escape valve |
| Crystal | Sapphire Crystal, sapphire bezel insert | Sapphire Crystal, sapphire caseback |
| Case Material | Titanium | 18k Sedna gold |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Blancpain's design language vs Omega's approach
The Blancpain Fifty Fathoms 45mm (titanium, blue dial) features a Titanium case at 45mm with Sapphire Crystal, sapphire bezel insert 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, Blancpain Calibre 1315 vs Automatic, Omega Co-Axial Master Chronometer Calibre 8901
The Fifty Fathoms 45mm (titanium, blue dial) runs the Automatic, Blancpain Calibre 1315 (Blancpain 1315, three barrels, silicon balance spring, About 120 hours (five days) power reserve) at standard 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 Fifty Fathoms 45mm (titanium, blue dial) edges ahead on power reserve.
Wearability & Fit
45mm vs 43.5mm — different wrist presence
At 45mm, the Fifty Fathoms 45mm (titanium, blue dial) has a bolder wrist presence compared to the Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) at 43.5mm. Water resistance differs: 300m (30 ATM) vs 600m (60 ATM), helium escape valve.
Value & Cost of Ownership
Blancpain sits in the lower tier
The Blancpain Fifty Fathoms 45mm (titanium, blue dial) sits at $10,000–$25,000 and the Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) at $25,000+. On the specs that outlast any price: the Fifty Fathoms 45mm (titanium, blue dial) uses Sapphire Crystal, sapphire bezel insert with About 120 hours (five days), 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
300m (30 ATM) vs 600m (60 ATM), helium escape valve
The Fifty Fathoms 45mm (titanium, blue dial) is rated to 300m (30 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
Blancpain
Fifty Fathoms 45mm (titanium, blue dial)
Choose the Blancpain Fifty Fathoms 45mm (titanium, blue dial) if you prioritize Blancpain 1315, three barrels, silicon balance spring engineering, Swiss Made craftsmanship, and 300m (30 ATM) water resistance. At $10,000–$25,000, it delivers Automatic, Blancpain Calibre 1315 with About 120 hours (five days) power reserve.
Check Price on AmazonOmega
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 Blancpain Fifty Fathoms 45mm (titanium, blue dial) and Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) represent two distinct approaches to fine watchmaking — the Blancpain 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.