Mido Ocean Star GMT vs Orient Kamasu Automatic Diver
Two divers compared — $1,000–$1,500 vs $250–$500
Quick Verdict
The Orient Kamasu Automatic Diver ($250–$500) delivers Orient In-House Automatic technology in the tier below the Mido Ocean Star GMT ($1,000–$1,500). The Kamasu Automatic Diver measures 41.8mm and is rated 200m (20 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 | Orient Kamasu Automatic Diver |
|---|---|---|
| Price | $1,000–$1,500 | $250–$500 |
| Case Size | 44mm | 41.8mm |
| Movement | Automatic Caliber 80 (Base ETA C07.661) | Automatic Caliber F6922 |
| Caliber Type | Automatic (ETA C07.661 base) | Orient In-House Automatic |
| Power Reserve | 80 Hours | 40 Hours |
| Water Resistance | 200m (20 ATM) | 200m (20 ATM) |
| 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 Orient's approach
The Mido Ocean Star GMT features a Stainless Steel case at 44mm with Sapphire with Double-sided AR protection. The Orient Kamasu Automatic Diver offers Stainless Steel construction at 41.8mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Caliber 80 (Base ETA C07.661) vs Automatic Caliber F6922
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 Kamasu Automatic Diver uses the Automatic Caliber F6922 (Orient In-House Automatic, 40 Hours reserve) at 21,600 vph (3 Hz). The Ocean Star GMT edges ahead on power reserve.
Wearability & Fit
44mm vs 41.8mm — different wrist presence
At 44mm, the Ocean Star GMT has a bolder wrist presence compared to the Kamasu Automatic Diver at 41.8mm. Water resistance differs: 200m (20 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Orient sits in the lower tier
The Mido Ocean Star GMT sits at $1,000–$1,500 and the Orient Kamasu Automatic Diver at $250–$500. On the specs that outlast any price: the Ocean Star GMT uses Sapphire with Double-sided AR with 80 Hours, against Sapphire Crystal and 40 Hours on the Kamasu Automatic Diver. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 200m (20 ATM)
The Ocean Star GMT is rated to 200m (20 ATM) while the Kamasu Automatic Diver handles 200m (20 ATM). Both offer identical water resistance ratings.
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 AmazonOrient
Kamasu Automatic Diver
Choose the Orient Kamasu Automatic Diver if you value Orient In-House Automatic technology, Made in Japan heritage, and 41.8mm proportions. At $250–$500, the Automatic Caliber F6922 with 40 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Mido Ocean Star GMT and Orient Kamasu Automatic Diver represent two distinct approaches to the diver category — the Mido bringing Swiss Made tradition while Orient delivers Made in Japan 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.