Mido Ocean Star GMT vs Seiko Prospex "Turtle"
Two divers compared — ~$1,410 vs ~$500
Quick Verdict
The Seiko Prospex "Turtle" (~$500) delivers In-House Automatic Manufacture technology at $910 less than the Mido Ocean Star GMT (~$1,410). 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 | Seiko Prospex "Turtle" |
|---|---|---|
| Price | ~$1,410 | ~$500 |
| Case Size | 44mm | 45mm |
| Movement | Automatic Caliber 80 (Base ETA C07.661) | Automatic Caliber 4R36 |
| Caliber Type | Automatic (ETA C07.661 base) | In-House Automatic Manufacture |
| Power Reserve | 80 Hours | 41 Hours |
| Water Resistance | 200m (20 ATM) | 200m (20 ATM) Diver |
| Crystal | Sapphire with Double-sided AR | Sapphire Crystal |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Mido's design language vs Seiko's approach
Movement & Performance
Automatic Caliber 80 (Base ETA C07.661) vs Automatic Caliber 4R36
Wearability & Fit
44mm vs 45mm — different wrist presence
Value & Cost of Ownership
Seiko is $910 more affordable
Water Resistance
200m (20 ATM) vs 200m (20 ATM) Diver
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 ~$1,410, it delivers Automatic Caliber 80 (Base ETA C07.661) with 80 Hours power reserve.
Check Price on AmazonSeiko
Prospex "Turtle"
Choose the Seiko Prospex "Turtle" if you value In-House Automatic Manufacture technology, Made in Japan heritage, and 45mm proportions. At ~$500, the Automatic Caliber 4R36 with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Mido Ocean Star GMT and Seiko Prospex "Turtle" represent two distinct approaches to the diver category — the Mido bringing Swiss Made tradition while Seiko delivers Made in Japan engineering.