Updated
Tissot PRX Powermatic 80 vs Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic)
Tissot's timepiece meets Omega's chronograph
Quick Verdict
The Tissot PRX Powermatic 80 ($500–$1,000) offers In-House Automatic (ETA C07.111 base) precision in the tier below the Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) ($25,000+). The PRX Powermatic 80 measures 40mm and is rated 100m (10 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 | Tissot PRX Powermatic 80 | Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) |
|---|---|---|
| Price | $500–$1,000 | $25,000+ |
| Case Size | 40mm | 43.5mm |
| Movement | Automatic Powermatic 80.111 | Automatic, Omega Co-Axial Master Chronometer Calibre 8901 |
| Caliber Type | In-House Automatic (ETA C07.111 base) | Omega 8901, METAS Master Chronometer, anti-magnetic to 15,000 gauss |
| Power Reserve | 80 Hours | About 60 hours |
| Water Resistance | 100m (10 ATM) | 600m (60 ATM), helium escape valve |
| Crystal | Scratch-resistant Sapphire | Sapphire Crystal, sapphire caseback |
| Case Material | 316L Stainless Steel | 18k Sedna gold |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Tissot's design language vs Omega's approach
The Tissot PRX Powermatic 80 features a 316L Stainless Steel case at 40mm with Scratch-resistant 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 Powermatic 80.111 vs Automatic, Omega Co-Axial Master Chronometer Calibre 8901
The PRX Powermatic 80 runs the Automatic Powermatic 80.111 (In-House Automatic (ETA C07.111 base), 80 Hours power reserve) at 21,600 vph (3 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 PRX Powermatic 80 edges ahead on power reserve.
Wearability & Fit
40mm vs 43.5mm — different wrist presence
At 40mm, the PRX Powermatic 80 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: 100m (10 ATM) vs 600m (60 ATM), helium escape valve.
Value & Cost of Ownership
Tissot sits in the lower tier
The Tissot PRX Powermatic 80 sits at $500–$1,000 and the Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) at $25,000+. On the specs that outlast any price: the PRX Powermatic 80 uses Scratch-resistant Sapphire with 80 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
100m (10 ATM) vs 600m (60 ATM), helium escape valve
The PRX Powermatic 80 is rated to 100m (10 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
Tissot
PRX Powermatic 80
Choose the Tissot PRX Powermatic 80 if you prioritize In-House Automatic (ETA C07.111 base) engineering, Swiss Made craftsmanship, and 100m (10 ATM) water resistance. At $500–$1,000, it delivers Automatic Powermatic 80.111 with 80 Hours 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 Tissot PRX Powermatic 80 and Omega Seamaster Planet Ocean 600M 43.5mm (Sedna gold, blue ceramic) represent two distinct approaches to fine watchmaking — the Tissot 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.