Frederique Constant Slimline Moonphase Manufacture vs Mido Ocean Star GMT
Frederique Constant's dress watch 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 Frederique Constant Slimline Moonphase Manufacture ($2,500–$5,000). The Ocean Star GMT measures 44mm and is rated 200m (20 ATM). The Slimline Moonphase Manufacture justifies its premium with Swiss Made heritage and Automatic FC-705 (In-House). Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Frederique Constant Slimline Moonphase Manufacture | Mido Ocean Star GMT |
|---|---|---|
| Price | $2,500–$5,000 | $1,000–$1,500 |
| Case Size | 42mm | 44mm |
| Movement | Automatic FC-705 (In-House) | Automatic Caliber 80 (Base ETA C07.661) |
| Caliber Type | In-House Automatic Manufacture | Automatic (ETA C07.661 base) |
| Power Reserve | 42 Hours | 80 Hours |
| Water Resistance | 30m (3 ATM) | 200m (20 ATM) |
| Crystal | Convex Sapphire | Sapphire with Double-sided AR |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Frederique Constant's design language vs Mido's approach
The Frederique Constant Slimline Moonphase Manufacture features a Stainless Steel case at 42mm with Convex 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 FC-705 (In-House) vs Automatic Caliber 80 (Base ETA C07.661)
The Slimline Moonphase Manufacture runs the Automatic FC-705 (In-House) (In-House Automatic Manufacture, 42 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
42mm vs 44mm — different wrist presence
At 42mm, the Slimline Moonphase Manufacture 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 Frederique Constant Slimline Moonphase Manufacture sits at $2,500–$5,000 and the Mido Ocean Star GMT at $1,000–$1,500. On the specs that outlast any price: the Slimline Moonphase Manufacture uses Convex Sapphire with 42 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 Slimline Moonphase Manufacture 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 | Frederique Constant Slimline Moonphase Manufacture | Mido Ocean Star GMT |
|---|---|---|
| Case alloy | Stainless steel 316L (standard mid-range Swiss spec) | Stainless steel 316L |
| Crystal | Synthetic sapphire grown via Verneuil process, Mohs 9, convex (domed) profile, anti-reflective coating 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 | None (dress watch by design) | Ceramic (ZrO₂) — scratchproof, color-stable. Engraved 24-hour scale |
| Dial finishing | Silver lacquer with applied indices and printed moonphase graphic + pointer date scale | Super-LumiNova (variant-dependent grade) |
| Strap | Black or brown calfskin leather with signed Frederique Constant buckle | Stainless steel 316L |
Cost of Ownership Compared
The Mido Ocean Star GMT saves you $3,483 over 5 years of ownership
Who Should Pick Which
Pick the Frederique Constant Slimline Moonphase Manufacture if…
- Those who prioritize scratch resistance — sapphire crystal
- Dress watch seekers who want understated elegance
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
Frederique Constant Slimline Moonphase Manufacture
- Brand recognition below heritage Swiss brands — Longines (1832), Omega, Tudor have stronger name recognition. FC (1988 founding) is a younger brand without the same cultural footprint despite genuine in-house horological credentials
- 42mm wears large for traditional dress watch — modern preference is often 38–40mm for dress; 42mm + slim bezel pushes visual presence larger
- 21mm lug width awkward for aftermarket strap fitment
- 30m WR limits to pure dress use — no swimming, no shower
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
Frederique Constant
Slimline Moonphase Manufacture
Choose the Frederique Constant Slimline Moonphase Manufacture if you prioritize In-House Automatic Manufacture engineering, Swiss Made craftsmanship, and 30m (3 ATM) water resistance. At $2,500–$5,000, it delivers Automatic FC-705 (In-House) with 42 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 Frederique Constant Slimline Moonphase Manufacture and Mido Ocean Star GMT represent two distinct approaches to fine watchmaking — the Frederique Constant bringing Swiss Made tradition while Mido 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.