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Tissot PRX Powermatic 80 vs Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500)
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 Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) ($10,000–$25,000). The PRX Powermatic 80 measures 40mm and is rated 100m (10 ATM). The Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) counters with Swiss Made craftsmanship and 300m (30 bar) water resistance. Both are exceptional watches for their respective tiers.
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Omega
Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500)
$10,000–$25,000
Specifications Compared
| Feature | Tissot PRX Powermatic 80 | Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) |
|---|---|---|
| Price | $500–$1,000 | $10,000–$25,000 |
| Case Size | 40mm | 42mm, 13.56mm thick, 49.9mm lug to lug, 20mm lugs |
| Movement | Automatic Powermatic 80.111 | Omega Co-Axial Master Chronometer calibre 8806, automatic, METAS certified |
| Caliber Type | In-House Automatic (ETA C07.111 base) | Omega 8806, Master Chronometer |
| Power Reserve | 80 Hours | About 55 hours |
| Water Resistance | 100m (10 ATM) | 300m (30 bar) |
| Crystal | Scratch-resistant Sapphire | Domed sapphire, anti-reflective both sides |
| Case Material | 316L Stainless Steel | Brushed grade 2 titanium; crown, bezel ring and helium escape valve in 18k Sedna gold; bezel base in tantalum; screw-in crown; sapphire caseback with the Seahorse |
| 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 Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) offers Brushed grade 2 titanium; crown, bezel ring and helium escape valve in 18k Sedna gold; bezel base in tantalum; screw-in crown; sapphire caseback with the Seahorse construction at 42mm, 13.56mm thick, 49.9mm lug to lug, 20mm lugs with Domed sapphire, anti-reflective both sides. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Powermatic 80.111 vs Omega Co-Axial Master Chronometer calibre 8806, automatic, METAS certified
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 Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) uses the Omega Co-Axial Master Chronometer calibre 8806, automatic, METAS certified (Omega 8806, Master Chronometer, About 55 hours reserve) at standard. The PRX Powermatic 80 edges ahead on power reserve.
Wearability & Fit
40mm vs 42mm, 13.56mm thick, 49.9mm lug to lug, 20mm lugs — different wrist presence
At 40mm, the PRX Powermatic 80 wears more compactly on smaller wrists compared to the Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) at 42mm, 13.56mm thick, 49.9mm lug to lug, 20mm lugs. Water resistance differs: 100m (10 ATM) vs 300m (30 bar).
Value & Cost of Ownership
Tissot sits in the lower tier
The Tissot PRX Powermatic 80 sits at $500–$1,000 and the Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) at $10,000–$25,000. On the specs that outlast any price: the PRX Powermatic 80 uses Scratch-resistant Sapphire with 80 Hours, against Domed sapphire, anti-reflective both sides and About 55 hours on the Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500). Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 300m (30 bar)
The PRX Powermatic 80 is rated to 100m (10 ATM) while the Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) handles 300m (30 bar). The Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) 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 Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500)
Choose the Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) if you value Omega 8806, Master Chronometer technology, Swiss Made heritage, and 42mm, 13.56mm thick, 49.9mm lug to lug, 20mm lugs proportions. At $10,000–$25,000, the Omega Co-Axial Master Chronometer calibre 8806, automatic, METAS certified with About 55 hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Tissot PRX Powermatic 80 and Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.60.42.20.99.001 (titanium, tantalum and Sedna gold, limited to 2,500) 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.