Casio MTP-S120L Solar Field vs Oris Aquis Date Calibre 400
Casio's field watch meets Oris's diver
Quick Verdict
The Casio MTP-S120L Solar Field ($100–$150) offers Casio Tough Solar Quartz precision at $2,400 less than the Oris Aquis Date Calibre 400 ($2,500–$5,000). The Aquis Date Calibre 400 counters with Swiss Made craftsmanship and 300m (30 ATM) water resistance. Both are exceptional watches for their respective price points.
Transparency — We earn a small commission on purchases made through our Amazon links. This doesn't affect our editorial independence.
Specifications Compared
| Feature | Casio MTP-S120L Solar Field | Oris Aquis Date Calibre 400 |
|---|---|---|
| Price | $100–$150 | $2,500–$5,000 |
| Case Size | 44.5mm | 41.5mm |
| Movement | Solar-Powered Quartz | Automatic Calibre 400 |
| Caliber Type | Casio Tough Solar Quartz | Oris In-House Manufacture |
| Power Reserve | Months on a full solar charge; no battery replacement | 120 Hours (5 Days) |
| Water Resistance | 100m (10 ATM) | 300m (30 ATM) |
| Crystal | Mineral Crystal | Sapphire Crystal with Anti-Reflective Coating |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Casio (Japan) | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Oris's approach
Movement & Performance
Solar-Powered Quartz vs Automatic Calibre 400
Wearability & Fit
44.5mm vs 41.5mm — different wrist presence
Value & Cost of Ownership
Casio is $2,400 more affordable
Water Resistance
100m (10 ATM) vs 300m (30 ATM)
Our Verdict
Casio
MTP-S120L Solar Field
Choose the Casio MTP-S120L Solar Field if you prioritize Casio Tough Solar Quartz engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At $100–$150, it delivers Solar-Powered Quartz with Months on a full solar charge; no battery replacement 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 Casio MTP-S120L Solar Field and Oris Aquis Date Calibre 400 represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Oris delivers Swiss Made engineering.

