Oris Aquis Date Calibre 400 vs Seiko Prospex "Turtle"
Two divers compared — ~$2,595 vs ~$500
Quick Verdict
The Seiko Prospex "Turtle" (~$500) delivers In-House Automatic Manufacture technology at $2,095 less than the Oris Aquis Date Calibre 400 (~$2,595). The Aquis Date Calibre 400 justifies its premium with Swiss Made heritage and Automatic Calibre 400. Both represent excellent choices in the diver category.
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Specifications Compared
| Feature | Oris Aquis Date Calibre 400 | Seiko Prospex "Turtle" |
|---|---|---|
| Price | ~$2,595 | ~$500 |
| Case Size | 41.5mm | 45mm |
| Movement | Automatic Calibre 400 | Automatic Caliber 4R36 |
| Caliber Type | Oris In-House Manufacture | In-House Automatic Manufacture |
| Power Reserve | 120 Hours (5 Days) | 41 Hours |
| Water Resistance | 300m (30 ATM) | 200m (20 ATM) Diver |
| Crystal | Sapphire Crystal with Anti-Reflective Coating | Sapphire Crystal |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Oris's design language vs Seiko's approach
Movement & Performance
Automatic Calibre 400 vs Automatic Caliber 4R36
Wearability & Fit
41.5mm vs 45mm — different wrist presence
Value & Cost of Ownership
Seiko is $2,095 more affordable
Water Resistance
300m (30 ATM) vs 200m (20 ATM) Diver
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 ~$2,595, it delivers Automatic Calibre 400 with 120 Hours (5 Days) power reserve.
Check Price on AmazonSeiko
Prospex "Turtle"
Choose the Seiko Prospex "Turtle" if you value In-House Automatic Manufacture technology, Made in Japan heritage, and 45mm proportions. At ~$500, the Automatic Caliber 4R36 with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Oris Aquis Date Calibre 400 and Seiko Prospex "Turtle" represent two distinct approaches to the diver category — the Oris bringing Swiss Made tradition while Seiko delivers Made in Japan engineering.