Frederique Constant Slimline Moonphase Manufacture vs Oris Aquis Date Calibre 400
Frederique Constant's dress watch meets Oris's diver
Quick Verdict
The Frederique Constant Slimline Moonphase Manufacture ($2,500–$5,000) and Oris Aquis Date Calibre 400 ($2,500–$5,000) are closely matched timepieces at similar price points. The Slimline Moonphase Manufacture emphasizes In-House Automatic Manufacture engineering while the Aquis Date Calibre 400 focuses on Swiss Made craftsmanship.
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Specifications Compared
| Feature | Frederique Constant Slimline Moonphase Manufacture | Oris Aquis Date Calibre 400 |
|---|---|---|
| Price | $2,500–$5,000 | $2,500–$5,000 |
| Case Size | 42mm | 41.5mm |
| Movement | Automatic FC-705 (In-House) | Automatic Calibre 400 |
| Caliber Type | In-House Automatic Manufacture | Oris In-House Manufacture |
| Power Reserve | 42 Hours | 120 Hours (5 Days) |
| Water Resistance | 30m (3 ATM) | 300m (30 ATM) |
| Crystal | Convex Sapphire | Sapphire Crystal with Anti-Reflective Coating |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Frederique Constant's design language vs Oris's approach
The Frederique Constant Slimline Moonphase Manufacture features a Stainless Steel case at 42mm with Convex Sapphire protection. The Oris Aquis Date Calibre 400 offers Stainless Steel construction at 41.5mm with Sapphire Crystal with Anti-Reflective Coating. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic FC-705 (In-House) vs Automatic Calibre 400
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 Aquis Date Calibre 400 uses the Automatic Calibre 400 (Oris In-House Manufacture, 120 Hours (5 Days) reserve) at 28,800 vph (4 Hz). The Aquis Date Calibre 400 offers a longer power reserve.
Wearability & Fit
42mm vs 41.5mm — different wrist presence
At 42mm, the Slimline Moonphase Manufacture has a bolder wrist presence compared to the Aquis Date Calibre 400 at 41.5mm. Water resistance differs: 30m (3 ATM) vs 300m (30 ATM).
Value & Cost of Ownership
Same tier — different value propositions
The Frederique Constant Slimline Moonphase Manufacture sits at $2,500–$5,000 and the Oris Aquis Date Calibre 400 at $2,500–$5,000. On the specs that outlast any price: the Slimline Moonphase Manufacture uses Convex Sapphire with 42 Hours, against Sapphire Crystal with Anti-Reflective Coating and 120 Hours (5 Days) on the Aquis Date Calibre 400. Service intervals are typically 5-7 years for both.
Water Resistance
30m (3 ATM) vs 300m (30 ATM)
The Slimline Moonphase Manufacture is rated to 30m (3 ATM) while the Aquis Date Calibre 400 handles 300m (30 ATM). The Aquis Date Calibre 400 offers superior water resistance.
Materials Face-Off
| Component | Frederique Constant Slimline Moonphase Manufacture | Oris Aquis Date Calibre 400 |
|---|---|---|
| Case alloy | Stainless steel 316L (standard mid-range Swiss spec) | Oris Caliber 733 |
| Crystal | Synthetic sapphire grown via Verneuil process, Mohs 9, convex (domed) profile, anti-reflective coating Mohs 9 | Domed sapphire with anti-reflective coating on inside |
| Lume specification | None (dress watch by design) | Stainless steel 316L (brushed and polished) |
| Dial finishing | Silver lacquer with applied indices and printed moonphase graphic + pointer date scale | Unidirectional rotating, scratch-resistant ceramic insert with 60-min dive scale and lume pip |
| Strap | Black or brown calfskin leather with signed Frederique Constant buckle | — |
Cost of Ownership Compared
The Oris Aquis Date Calibre 400 saves you $2,250 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 Oris Aquis Date Calibre 400 if…
- Dive watch enthusiasts — 300m water resistance is proper dive spec
- Those who prioritize scratch resistance — sapphire crystal
- Dive watch collectors who appreciate proper ISO-rated tool watches
- Buyers who prefer a commanding wrist presence — 43mm case
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
Oris Aquis Date Calibre 400
- Sellita base movement at this price — fair value but not in-house prestige (Caliber 400 variants resolve).
- 43.5mm large for smaller wrists (smaller variants available).
- Proprietary endlinks limit strap options.
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 AmazonOris
Aquis Date Calibre 400
Choose the Oris Aquis Date Calibre 400 if you value Oris In-House Manufacture technology, Swiss Made heritage, and 41.5mm proportions. At $2,500–$5,000, the Automatic Calibre 400 with 120 Hours (5 Days) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Frederique Constant Slimline Moonphase Manufacture and Oris Aquis Date Calibre 400 represent two distinct approaches to fine watchmaking — the Frederique Constant bringing Swiss Made tradition while Oris 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.