Longines Master Collection Moonphase vs Oris Aquis Date Calibre 400
Longines's dress watch meets Oris's diver
Quick Verdict
The Longines Master Collection Moonphase ($2,500–$5,000) and Oris Aquis Date Calibre 400 ($2,500–$5,000) are closely matched timepieces at similar price points. The Master Collection Moonphase emphasizes Automatic (ETA A31.L91 base) engineering while the Aquis Date Calibre 400 focuses on Swiss Made craftsmanship.
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Specifications Compared
| Feature | Longines Master Collection Moonphase | Oris Aquis Date Calibre 400 |
|---|---|---|
| Price | $2,500–$5,000 | $2,500–$5,000 |
| Case Size | 40mm | 41.5mm |
| Movement | Automatic Caliber L899 | Automatic Calibre 400 |
| Caliber Type | Automatic (ETA A31.L91 base) | Oris In-House Manufacture |
| Power Reserve | 72 Hours | 120 Hours (5 Days) |
| Water Resistance | 30m (3 ATM) | 300m (30 ATM) |
| Crystal | Sapphire Crystal | Sapphire Crystal with Anti-Reflective Coating |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Longines's design language vs Oris's approach
The Longines Master Collection Moonphase features a Stainless Steel case at 40mm with Sapphire Crystal 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 Caliber L899 vs Automatic Calibre 400
The Master Collection Moonphase runs the Automatic Caliber L899 (Automatic (ETA A31.L91 base), 72 Hours power reserve) at 25,200 vph (3.5 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
40mm vs 41.5mm — different wrist presence
At 40mm, the Master Collection Moonphase wears more compactly on smaller wrists 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 Longines Master Collection Moonphase 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 Master Collection Moonphase uses Sapphire Crystal with 72 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 Master Collection Moonphase 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 | Longines Master Collection Moonphase | 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, anti-reflective coating on interior. 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 | Barleycorn guilloché — fine textured pattern resembling barley seed heads, machine-engraved or stamped into the dial brass disc. One of horology's cl | Unidirectional rotating, scratch-resistant ceramic insert with 60-min dive scale and lume pip |
| Hand finishing | Blued steel via thermal treatment (heat-blued) or chemical bluing process. | — |
Cost of Ownership Compared
The Oris Aquis Date Calibre 400 saves you $261 over 5 years of ownership
Who Should Pick Which
Pick the Longines Master Collection Moonphase if…
- Weekend warriors — 72-hour power reserve means it survives two days off the wrist
- 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
Longines Master Collection Moonphase
- ETA A31 base at this price — though Longines-exclusive, the architecture is shared platform. Some buyers expect in-house at this price.
- 30m water resistance — strictly dress watch use; no swimming, no shower
- Moonphase indication is rough — like most "simple" moonphase movements, the 29.5-day approximation is imprecise vs. actual 29.53-day lunar cycle (requires ~1-day adjustment every 2.5 years)
- 3.5 Hz frequency is unusual — not as smooth as 4 Hz peers
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
Longines
Master Collection Moonphase
Choose the Longines Master Collection Moonphase if you prioritize Automatic (ETA A31.L91 base) engineering, Swiss Made craftsmanship, and 30m (3 ATM) water resistance. At $2,500–$5,000, it delivers Automatic Caliber L899 with 72 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 Longines Master Collection Moonphase and Oris Aquis Date Calibre 400 represent two distinct approaches to fine watchmaking — the Longines 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.