Omega Speedmaster Professional vs Oris Aquis Date Calibre 400
Omega's chronograph meets Oris's diver
Quick Verdict
The Oris Aquis Date Calibre 400 ($2,500–$5,000) delivers Oris In-House Manufacture technology in the tier below the Omega Speedmaster Professional ($5,000–$10,000). The Aquis Date Calibre 400 measures 41.5mm and is rated 300m (30 ATM). The Speedmaster Professional justifies its premium with Swiss Made heritage and Manual-Winding Caliber 3861. Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Omega Speedmaster Professional | Oris Aquis Date Calibre 400 |
|---|---|---|
| Price | $5,000–$10,000 | $2,500–$5,000 |
| Case Size | 42mm | 41.5mm |
| Movement | Manual-Winding Caliber 3861 | Automatic Calibre 400 |
| Caliber Type | In-House Manual-Winding Manufacture (Co-Axial) | Oris In-House Manufacture |
| Power Reserve | 50 Hours | 120 Hours (5 Days) |
| Water Resistance | 50m (5 ATM) | 300m (30 ATM) |
| Crystal | Hesalite or Sapphire | Sapphire Crystal with Anti-Reflective Coating |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Omega's design language vs Oris's approach
The Omega Speedmaster Professional features a Stainless Steel case at 42mm with Hesalite or 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
Manual-Winding Caliber 3861 vs Automatic Calibre 400
The Speedmaster Professional runs the Manual-Winding Caliber 3861 (In-House Manual-Winding Manufacture (Co-Axial), 50 Hours power reserve) at 21,600 vph (3 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 Speedmaster Professional has a bolder wrist presence compared to the Aquis Date Calibre 400 at 41.5mm. Water resistance differs: 50m (5 ATM) vs 300m (30 ATM).
Value & Cost of Ownership
Oris sits in the lower tier
The Omega Speedmaster Professional sits at $5,000–$10,000 and the Oris Aquis Date Calibre 400 at $2,500–$5,000. On the specs that outlast any price: the Speedmaster Professional uses Hesalite or Sapphire with 50 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
50m (5 ATM) vs 300m (30 ATM)
The Speedmaster Professional is rated to 50m (5 ATM) while the Aquis Date Calibre 400 handles 300m (30 ATM). The Aquis Date Calibre 400 offers superior water resistance.
Materials Face-Off
| Component | Omega Speedmaster Professional | Oris Aquis Date Calibre 400 |
|---|---|---|
| Co-Axial Caliber 3861 | Manual-wind chronograph with Co-Axial escapement (George Daniels design, licensed 1999). Si14 silicon balance spring, free-sprung balance, 234 components, 26 jewels | Oris Caliber 733 |
| Hesalite Crystal | Hardened acrylic (Mohs ~2–3) with embossed central Omega logo — the NASA flight-qualified specification Mohs 2.5 | Domed sapphire with anti-reflective coating on inside |
| Silicon Balance Spring (Si14) | Omega's proprietary Si14 silicon hairspring — in series production since 2008 | Stainless steel 316L (brushed and polished) |
| Aluminum Tachymeter Bezel | Fixed black anodized aluminum with white tachymeter scale. Preserves the "DOT OVER NINETY" detail from the Apollo 11–era watches | Unidirectional rotating, scratch-resistant ceramic insert with 60-min dive scale and lume pip |
| Stainless Steel Case | 42mm asymmetric case with integrated crown guards (added in 1964 for the 105.012 — the reference Buzz Aldrin wore on the Moon) | — |
Cost of Ownership Compared
The Oris Aquis Date Calibre 400 saves you $4,975 over 5 years of ownership
Who Should Pick Which
Pick the Omega Speedmaster Professional if…
- History and heritage enthusiasts — the only watch worn on the Moon, with NASA documentation to prove it
- METAS Master Chronometer accuracy at sub-$8,000 — antimagnetic to 15,000 gauss, 0/+5 sec/day
- Chronograph lovers — the manual-wind ritual and hand-wound feel is deeply satisfying
- Value seekers at grey market $5,200–$5,500 — one of the cheapest 5-figure-quality chronographs from a top-tier maison
- Available off-the-shelf — walk into any Omega boutique and buy one today (no Rolex-style waitlist)
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
Omega Speedmaster Professional
- Hesalite scratches — acrylic at Mohs ~2–3 is dramatically softer than sapphire. Polishes out with PolyWatch in 5 minutes, but it's high-maintenance for desk-diving wear
- No screw-down crown, 50m water resistance — this is a NASA chronograph, not a dive watch. Shower-safe, swim-cautious, never deep water
- Manual wind — not for the set-and-forget buyer. Daily winding is part of the ritual; some find it charming, some find it inconvenient
- Wears thick at 13.18mm with a proud bezel — reads as 43–44mm visually because of the broad lug profile
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
Omega
Speedmaster Professional
Choose the Omega Speedmaster Professional if you prioritize In-House Manual-Winding Manufacture (Co-Axial) engineering, Swiss Made craftsmanship, and 50m (5 ATM) water resistance. At $5,000–$10,000, it delivers Manual-Winding Caliber 3861 with 50 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 Omega Speedmaster Professional and Oris Aquis Date Calibre 400 represent two distinct approaches to fine watchmaking — the Omega bringing Swiss Made tradition while Oris delivers Swiss Made engineering.
Frequently Asked Questions
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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.