Breitling Navitimer B01 vs Mido Ocean Star GMT
Breitling's chronograph meets Mido's diver
Quick Verdict
The Mido Ocean Star GMT ($1,000–$1,500) delivers Automatic (ETA C07.661 base) technology in the tier below the Breitling Navitimer B01 ($10,000–$25,000). The Ocean Star GMT measures 44mm and is rated 200m (20 ATM). The Navitimer B01 justifies its premium with Swiss Made heritage and Automatic Breitling 01 (Manufacture). Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Breitling Navitimer B01 | Mido Ocean Star GMT |
|---|---|---|
| Price | $10,000–$25,000 | $1,000–$1,500 |
| Case Size | 43mm | 44mm |
| Movement | Automatic Breitling 01 (Manufacture) | Automatic Caliber 80 (Base ETA C07.661) |
| Caliber Type | In-House Automatic Chronograph Manufacture | Automatic (ETA C07.661 base) |
| Power Reserve | 70 Hours | 80 Hours |
| Water Resistance | 30m (3 ATM) | 200m (20 ATM) |
| Crystal | Cambered Sapphire | Sapphire with Double-sided AR |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Breitling's design language vs Mido's approach
The Breitling Navitimer B01 features a Stainless Steel case at 43mm with Cambered Sapphire protection. The Mido Ocean Star GMT offers Stainless Steel construction at 44mm with Sapphire with Double-sided AR. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Breitling 01 (Manufacture) vs Automatic Caliber 80 (Base ETA C07.661)
The Navitimer B01 runs the Automatic Breitling 01 (Manufacture) (In-House Automatic Chronograph Manufacture, 70 Hours power reserve) at 28,800 vph (4 Hz) frequency. The Ocean Star GMT uses the Automatic Caliber 80 (Base ETA C07.661) (Automatic (ETA C07.661 base), 80 Hours reserve) at 21,600 vph (3 Hz). The Ocean Star GMT offers a longer power reserve.
Wearability & Fit
43mm vs 44mm — different wrist presence
At 43mm, the Navitimer B01 wears more compactly on smaller wrists compared to the Ocean Star GMT at 44mm. Water resistance differs: 30m (3 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Mido sits in the lower tier
The Breitling Navitimer B01 sits at $10,000–$25,000 and the Mido Ocean Star GMT at $1,000–$1,500. On the specs that outlast any price: the Navitimer B01 uses Cambered Sapphire with 70 Hours, against Sapphire with Double-sided AR and 80 Hours on the Ocean Star GMT. Service intervals are typically 5-7 years for both.
Water Resistance
30m (3 ATM) vs 200m (20 ATM)
The Navitimer B01 is rated to 30m (3 ATM) while the Ocean Star GMT handles 200m (20 ATM). The Ocean Star GMT offers superior water resistance.
Materials Face-Off
| Component | Breitling Navitimer B01 | Mido Ocean Star GMT |
|---|---|---|
| Case alloy | Stainless steel 316L — the industry-standard mid-range Swiss spec. | Stainless steel 316L |
| Sapphire crystal | Synthetic corundum (Al₂O₃), grown via the Verneuil process for crystal blanks then formed into the cambered (domed) shape. Mohs hardness 9. Anti-refle Mohs 9 | Synthetic sapphire grown via Verneuil process, Mohs 9. Double-sided AR coating — uncommon at this price tier, provides exceptionally clear dial readi Mohs 9 |
| Lume specification | Super-LumiNova on the hands and markers. Grade and glow duration are not published by the manufacturer for this reference, so neither is claimed here. | Ceramic (ZrO₂) — scratchproof, color-stable. Engraved 24-hour scale |
| Bracelet alloy | Stainless steel 316L matching the case. | Super-LumiNova (variant-dependent grade) |
| Bracelet alloy | — | Stainless steel 316L |
Cost of Ownership Compared
The Mido Ocean Star GMT saves you $8,520 over 5 years of ownership
Who Should Pick Which
Pick the Breitling Navitimer B01 if…
- Buyers wanting an in-house movement at the $9K price point
- Accuracy-minded buyers — COSC chronometer certification guarantees precision
- Weekend warriors — 70-hour power reserve means it survives two days off the wrist
- Those who prioritize scratch resistance — sapphire crystal
- Chronograph enthusiasts looking for a proven timing instrument
Pick the Mido Ocean Star GMT if…
- Enthusiasts wanting proven Swiss/Japanese quality in the $1,000–$2,000 sweet spot
- Dive watch enthusiasts — 200m water resistance is proper dive spec
- Weekend warriors — 80-hour power reserve means it survives two days off the wrist
- Those who prioritize scratch resistance — sapphire crystal
- Dive watch collectors who appreciate proper ISO-rated tool watches
Breitling Navitimer B01
- 30m water resistance is the headline weakness. At the upper end of the $5,000–$10,000 band this is the most-criticised spec. The Navitimer is an aviation tool, not a water watch.
- Slide rule learning curve. Most owners never actually use the slide rule for in-flight calculation. Knowing how to operate it is a horological badge-of-honour, not a daily-driver feature.
- Dial visual density. The Navitimer dial is the watch's character, but it is also the most cluttered face in any luxury watch under $10k. People who want a clean dial will not love this watch.
- 43mm wears large. The 43mm case + 22mm lug width + cambered crystal pushes the visual presence above the spec. Try before you buy if you're under 6.75" wrist.
Mido Ocean Star GMT
- 44mm wears large — too big for under-7" wrists
- ETA base movement at this price — fair value but not in-house prestige
- Crystal AR coating can show fingerprints — double-sided AR is a quality upgrade but requires more frequent wipe-downs
- Bracelet quality is adequate not exceptional — most owners report the bracelet is the watch's weak point; aftermarket rubber/MN straps significantly upgrade daily wear
Our Verdict
Breitling
Navitimer B01
Choose the Breitling Navitimer B01 if you prioritize In-House Automatic Chronograph Manufacture engineering, Swiss Made craftsmanship, and 30m (3 ATM) water resistance. At $10,000–$25,000, it delivers Automatic Breitling 01 (Manufacture) with 70 Hours power reserve.
Check Price on AmazonMido
Ocean Star GMT
Choose the Mido Ocean Star GMT if you value Automatic (ETA C07.661 base) technology, Swiss Made heritage, and 44mm proportions. At $1,000–$1,500, the Automatic Caliber 80 (Base ETA C07.661) with 80 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Breitling Navitimer B01 and Mido Ocean Star GMT represent two distinct approaches to fine watchmaking — the Breitling bringing Swiss Made tradition while Mido 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.