Updated
Mido Ocean Star GMT vs Rolex GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee)
Mido's diver meets Rolex's GMT watch
Quick Verdict
The Mido Ocean Star GMT ($1,000–$1,500) offers Automatic (ETA C07.661 base) precision in the tier below the Rolex GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) ($10,000–$25,000). The Ocean Star GMT measures 44mm and is rated 200m (20 ATM). The GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) counters with Swiss Made craftsmanship and 100m (10 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Rolex
GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee)
$10,000–$25,000
Specifications Compared
| Feature | Mido Ocean Star GMT | Rolex GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) |
|---|---|---|
| Price | $1,000–$1,500 | $10,000–$25,000 |
| Case Size | 44mm | 40mm |
| Movement | Automatic Caliber 80 (Base ETA C07.661) | Automatic with 24-hour hand and date; calibre 3075 (16753) or 3185 with independent hour hand (16713). Ask which reference |
| Caliber Type | Automatic (ETA C07.661 base) | Rolex, chronometer |
| Power Reserve | 80 Hours | About 42 hours (16753) or about 50 hours (16713) |
| Water Resistance | 200m (20 ATM) | 100m (10 ATM) |
| Crystal | Sapphire with Double-sided AR | Sapphire Crystal, Cyclops |
| Case Material | Stainless Steel | Stainless steel and 18k yellow gold (Rolesor), bidirectional bezel with black insert |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Mido's design language vs Rolex's approach
The Mido Ocean Star GMT features a Stainless Steel case at 44mm with Sapphire with Double-sided AR protection. The Rolex GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) offers Stainless steel and 18k yellow gold (Rolesor), bidirectional bezel with black insert construction at 40mm with Sapphire Crystal, Cyclops. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Caliber 80 (Base ETA C07.661) vs Automatic with 24-hour hand and date; calibre 3075 (16753) or 3185 with independent hour hand (16713). Ask which reference
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 GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) uses the Automatic with 24-hour hand and date; calibre 3075 (16753) or 3185 with independent hour hand (16713). Ask which reference (Rolex, chronometer, About 42 hours (16753) or about 50 hours (16713) reserve) at standard. The Ocean Star GMT edges ahead on power reserve.
Wearability & Fit
44mm vs 40mm — different wrist presence
At 44mm, the Ocean Star GMT has a bolder wrist presence compared to the GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) at 40mm. Water resistance differs: 200m (20 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Mido sits in the lower tier
The Mido Ocean Star GMT sits at $1,000–$1,500 and the Rolex GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) at $10,000–$25,000. On the specs that outlast any price: the Ocean Star GMT uses Sapphire with Double-sided AR with 80 Hours, against Sapphire Crystal, Cyclops and About 42 hours (16753) or about 50 hours (16713) on the GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee). Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 100m (10 ATM)
The Ocean Star GMT is rated to 200m (20 ATM) while the GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) handles 100m (10 ATM). The Ocean Star GMT is better suited for water activities.
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 AmazonRolex
GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee)
Choose the Rolex GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) if you value Rolex, chronometer technology, Swiss Made heritage, and 40mm proportions. At $10,000–$25,000, the Automatic with 24-hour hand and date; calibre 3075 (16753) or 3185 with independent hour hand (16713). Ask which reference with About 42 hours (16753) or about 50 hours (16713) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Mido Ocean Star GMT and Rolex GMT-Master 40mm (steel and yellow gold, black dial, black bezel, Jubilee) represent two distinct approaches to fine watchmaking — the Mido bringing Swiss Made tradition while Rolex 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.