Mido Ocean Star GMT vs Tissot Seastar 1000 Automatic
Two divers compared — $1,000–$1,500 vs $500–$1,000
Quick Verdict
The Tissot Seastar 1000 Automatic ($500–$1,000) delivers ETA/Tissot Automatic technology in the tier below the Mido Ocean Star GMT ($1,000–$1,500). The Seastar 1000 Automatic measures 40mm and is rated 300m (30 ATM). The Ocean Star GMT justifies its premium with Swiss Made heritage and Automatic Caliber 80 (Base ETA C07.661). Both represent excellent choices in the diver category.
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Specifications Compared
| Feature | Mido Ocean Star GMT | Tissot Seastar 1000 Automatic |
|---|---|---|
| Price | $1,000–$1,500 | $500–$1,000 |
| Case Size | 44mm | 40mm |
| Movement | Automatic Caliber 80 (Base ETA C07.661) | Automatic Powermatic 80 (Caliber 80.111) |
| Caliber Type | Automatic (ETA C07.661 base) | ETA/Tissot Automatic |
| Power Reserve | 80 Hours | 80 Hours |
| Water Resistance | 200m (20 ATM) | 300m (30 ATM) |
| Crystal | Sapphire with Double-sided AR | Sapphire Crystal |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Mido's design language vs Tissot's approach
The Mido Ocean Star GMT features a Stainless Steel case at 44mm with Sapphire with Double-sided AR 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 Caliber 80 (Base ETA C07.661) vs Automatic Powermatic 80 (Caliber 80.111)
The Ocean Star GMT runs the Automatic Caliber 80 (Base ETA C07.661) (Automatic (ETA C07.661 base), 80 Hours power reserve) at 21,600 vph (3 Hz) 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). Power reserves are closely matched.
Wearability & Fit
44mm vs 40mm — different wrist presence
At 44mm, the Ocean Star GMT has a bolder wrist presence compared to the Seastar 1000 Automatic at 40mm. Water resistance differs: 200m (20 ATM) vs 300m (30 ATM).
Value & Cost of Ownership
Tissot sits in the lower tier
The Mido Ocean Star GMT sits at $1,000–$1,500 and the Tissot Seastar 1000 Automatic at $500–$1,000. On the specs that outlast any price: the Ocean Star GMT uses Sapphire with Double-sided AR with 80 Hours, against Sapphire Crystal and 80 Hours on the Seastar 1000 Automatic. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 300m (30 ATM)
The Ocean Star GMT is rated to 200m (20 ATM) while the Seastar 1000 Automatic handles 300m (30 ATM). The Seastar 1000 Automatic offers superior water resistance.
Our Verdict
Mido
Ocean Star GMT
Choose the Mido Ocean Star GMT if you prioritize Automatic (ETA C07.661 base) engineering, Swiss Made craftsmanship, and 200m (20 ATM) water resistance. At $1,000–$1,500, it delivers Automatic Caliber 80 (Base ETA C07.661) with 80 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.
Check Price on AmazonThe Bottom Line
The Mido Ocean Star GMT and Tissot Seastar 1000 Automatic represent two distinct approaches to the diver category — the Mido bringing Swiss Made tradition while Tissot delivers Swiss Made engineering.
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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.