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Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) vs Tissot Seastar 1000 Automatic
Omega's chronograph meets Tissot's diver
Quick Verdict
The Tissot Seastar 1000 Automatic ($500–$1,000) delivers ETA/Tissot Automatic technology in the tier below the Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) ($10,000–$25,000). The Seastar 1000 Automatic measures 40mm and is rated 300m (30 ATM). The Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) justifies its premium with Swiss Made heritage and Automatic, Omega Co-Axial Master Chronometer calibre 8800 (METAS). Both represent excellent choices in the luxury watch category.
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Omega
Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet)
$10,000–$25,000
Specifications Compared
| Feature | Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) | Tissot Seastar 1000 Automatic |
|---|---|---|
| Price | $10,000–$25,000 | $500–$1,000 |
| Case Size | 42mm, 11mm thick per the seller (Omega: 13.6mm) | 40mm |
| Movement | Automatic, Omega Co-Axial Master Chronometer calibre 8800 (METAS) | Automatic Powermatic 80 (Caliber 80.111) |
| Caliber Type | Omega 8800, Master Chronometer | ETA/Tissot Automatic |
| Power Reserve | About 55 hours | 80 Hours |
| Water Resistance | 300m (30 ATM) | 300m (30 ATM) |
| Crystal | Sapphire Crystal | Sapphire Crystal |
| Case Material | Stainless steel with an 18k Sedna gold unidirectional bezel and blue ceramic insert, helium escape valve, sapphire caseback | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Omega's design language vs Tissot's approach
The Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) features a Stainless steel with an 18k Sedna gold unidirectional bezel and blue ceramic insert, helium escape valve, sapphire caseback case at 42mm, 11mm thick per the seller (Omega: 13.6mm) with Sapphire Crystal protection. The Tissot Seastar 1000 Automatic offers Stainless Steel construction at 40mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic, Omega Co-Axial Master Chronometer calibre 8800 (METAS) vs Automatic Powermatic 80 (Caliber 80.111)
The Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) runs the Automatic, Omega Co-Axial Master Chronometer calibre 8800 (METAS) (Omega 8800, Master Chronometer, About 55 hours power reserve) at standard frequency. The Seastar 1000 Automatic uses the Automatic Powermatic 80 (Caliber 80.111) (ETA/Tissot Automatic, 80 Hours reserve) at 21,600 vph (3 Hz). The Seastar 1000 Automatic offers a longer power reserve.
Wearability & Fit
42mm, 11mm thick per the seller (Omega: 13.6mm) vs 40mm — different wrist presence
At 42mm, 11mm thick per the seller (Omega: 13.6mm), the Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) has a bolder wrist presence compared to the Seastar 1000 Automatic at 40mm. Water resistance differs: 300m (30 ATM) vs 300m (30 ATM).
Value & Cost of Ownership
Tissot sits in the lower tier
The Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) sits at $10,000–$25,000 and the Tissot Seastar 1000 Automatic at $500–$1,000. On the specs that outlast any price: the Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) uses Sapphire Crystal with About 55 hours, against Sapphire Crystal and 80 Hours on the Seastar 1000 Automatic. Service intervals are typically 5-7 years for both.
Water Resistance
300m (30 ATM) vs 300m (30 ATM)
The Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) is rated to 300m (30 ATM) while the Seastar 1000 Automatic handles 300m (30 ATM). Both offer identical water resistance ratings.
Our Verdict
Omega
Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet)
Choose the Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) if you prioritize Omega 8800, Master Chronometer engineering, Swiss Made craftsmanship, and 300m (30 ATM) water resistance. At $10,000–$25,000, it delivers Automatic, Omega Co-Axial Master Chronometer calibre 8800 (METAS) with About 55 hours power reserve.
Check Price on AmazonTissot
Seastar 1000 Automatic
Choose the Tissot Seastar 1000 Automatic if you value ETA/Tissot Automatic technology, Swiss Made heritage, and 40mm proportions. At $500–$1,000, the Automatic Powermatic 80 (Caliber 80.111) with 80 Hours power reserve makes it a compelling choice.
View the dossierThe Bottom Line
The Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.20.42.20.03.002 (steel and Sedna gold, blue dial, bracelet) and Tissot Seastar 1000 Automatic represent two distinct approaches to fine watchmaking — the Omega bringing Swiss Made tradition while Tissot delivers Swiss Made engineering.
Frequently Asked Questions
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How This Page Was Made
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