Oris Aquis Date Calibre 400 vs Tag Heuer Aquaracer Professional 300
Two divers compared — $2,500–$5,000 vs $2,500–$5,000
Quick Verdict
The Oris Aquis Date Calibre 400 ($2,500–$5,000) and Tag Heuer Aquaracer Professional 300 ($2,500–$5,000) are closely matched divers at similar price points. The Aquis Date Calibre 400 emphasizes Oris In-House Manufacture engineering while the Aquaracer Professional 300 focuses on Swiss Made craftsmanship.
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Specifications Compared
| Feature | Oris Aquis Date Calibre 400 | Tag Heuer Aquaracer Professional 300 |
|---|---|---|
| Price | $2,500–$5,000 | $2,500–$5,000 |
| Case Size | 41.5mm | 43mm |
| Movement | Automatic Calibre 400 | Automatic Caliber 5 |
| Caliber Type | Oris In-House Manufacture | Automatic (ETA 2824-2 / Sellita SW200 base) |
| Power Reserve | 120 Hours (5 Days) | 38 Hours |
| Water Resistance | 300m (30 ATM) | 300m (30 ATM) |
| Crystal | Sapphire Crystal with Anti-Reflective Coating | Sapphire with Anti-Reflective Coating |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Oris's design language vs Tag Heuer's approach
The Oris Aquis Date Calibre 400 features a Stainless Steel case at 41.5mm with Sapphire Crystal with Anti-Reflective Coating protection. The Tag Heuer Aquaracer Professional 300 offers Stainless Steel construction at 43mm with Sapphire with Anti-Reflective Coating. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Calibre 400 vs Automatic Caliber 5
The Aquis Date Calibre 400 runs the Automatic Calibre 400 (Oris In-House Manufacture, 120 Hours (5 Days) power reserve) at 28,800 vph (4 Hz) frequency. The Aquaracer Professional 300 uses the Automatic Caliber 5 (Automatic (ETA 2824-2 / Sellita SW200 base), 38 Hours reserve) at 28,800 vph (4 Hz). The Aquis Date Calibre 400 edges ahead on power reserve.
Wearability & Fit
41.5mm vs 43mm — different wrist presence
At 41.5mm, the Aquis Date Calibre 400 wears more compactly on smaller wrists compared to the Aquaracer Professional 300 at 43mm. Water resistance differs: 300m (30 ATM) vs 300m (30 ATM).
Value & Cost of Ownership
Same tier — different value propositions
The Oris Aquis Date Calibre 400 sits at $2,500–$5,000 and the Tag Heuer Aquaracer Professional 300 at $2,500–$5,000. On the specs that outlast any price: the Aquis Date Calibre 400 uses Sapphire Crystal with Anti-Reflective Coating with 120 Hours (5 Days), against Sapphire with Anti-Reflective Coating and 38 Hours on the Aquaracer Professional 300. Service intervals are typically 5-7 years for both.
Water Resistance
300m (30 ATM) vs 300m (30 ATM)
The Aquis Date Calibre 400 is rated to 300m (30 ATM) while the Aquaracer Professional 300 handles 300m (30 ATM). Both offer identical water resistance ratings.
Materials Face-Off
| Component | Oris Aquis Date Calibre 400 | Tag Heuer Aquaracer Professional 300 |
|---|---|---|
| Movement | Oris Caliber 733 | Stainless steel 316L (medical-grade, with composition Cr 16–18%, Ni 10–14%, Mo 2–3%). Standard mid-range Swiss spec. Not 904L (Rolex Oystersteel) or G |
| Crystal | Domed sapphire with anti-reflective coating on inside | Ceramic (zirconia-based ZrO₂) — virtually scratchproof (Mohs ~9), color-stable under UV exposure. The ceramic is sintered, then engraved with dive sc |
| Case | Stainless steel 316L (brushed and polished) | Synthetic sapphire (Al₂O₃) grown via the Verneuil process, Mohs 9. Anti-reflective coating on interior surface only. Cyclops magnifier above date wind Mohs 9 |
| Bezel | Unidirectional rotating, scratch-resistant ceramic insert with 60-min dive scale and lume pip | Super-LumiNova on the hands and indices. Grade and glow duration are not published by the manufacturer for this reference, so neither is claimed here. |
| Bracelet alloy | — | Stainless steel 316L matching the case. |
Cost of Ownership Compared
The Oris Aquis Date Calibre 400 saves you $1,021 over 5 years of ownership
Who Should Pick Which
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
Pick the Tag Heuer Aquaracer Professional 300 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
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.
Tag Heuer Aquaracer Professional 300
- Sellita SW200-1 base at a $2,500–$5,000 band retail — many enthusiasts feel TAG Heuer charges a brand premium that the movement doesn't justify (Hamilton Khaki Field with similar movement architecture retails ~$700). The Aquaracer's price reflects brand positioning rather than movement engineering.
- 38-hour power reserve — modest by 2026 standards where peers (Tudor MT5402: 70h, Longines L888.5: 72h, ETA C07/H-10: 80h) offer significantly more reserve.
- 21mm lug width — unusual width limits aftermarket strap compatibility.
- Cyclops magnifier — polarising design element; some buyers love it, others find it dated.
Our Verdict
Oris
Aquis Date Calibre 400
Choose the Oris Aquis Date Calibre 400 if you prioritize Oris In-House Manufacture engineering, Swiss Made craftsmanship, and 300m (30 ATM) water resistance. At $2,500–$5,000, it delivers Automatic Calibre 400 with 120 Hours (5 Days) power reserve.
Check Price on AmazonTag Heuer
Aquaracer Professional 300
Choose the Tag Heuer Aquaracer Professional 300 if you value Automatic (ETA 2824-2 / Sellita SW200 base) technology, Swiss Made heritage, and 43mm proportions. At $2,500–$5,000, the Automatic Caliber 5 with 38 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Oris Aquis Date Calibre 400 and Tag Heuer Aquaracer Professional 300 represent two distinct approaches to the diver category — the Oris bringing Swiss Made tradition while Tag Heuer 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.