Casio F-91W vs Longines HydroConquest Automatic
Casio's timepiece meets Longines's diver
Quick Verdict
The Casio F-91W (~$20) offers Casio Digital Quartz (Battery) precision at $1,980 less than the Longines HydroConquest Automatic (~$2,000). The HydroConquest Automatic counters with Swiss Made craftsmanship and 300m (30 ATM) water resistance. Both are exceptional watches for their respective price points.
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Specifications Compared
| Feature | Casio F-91W | Longines HydroConquest Automatic |
|---|---|---|
| Price | ~$20 | ~$2,000 |
| Case Size | 35mm | 41mm |
| Movement | Quartz Module 593 | Automatic L888.5 |
| Caliber Type | Casio Digital Quartz (Battery) | ETA-Based Automatic with Silicon Balance Spring |
| Power Reserve | 7-Year Battery | 72 Hours |
| Water Resistance | 30m (Splash Resistant) | 300m (30 ATM) |
| Crystal | Acrylic | Sapphire with Anti-Reflective Coating |
| Case Material | Resin | Stainless Steel |
| Origin | Casio (Japan) | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Longines's approach
Movement & Performance
Quartz Module 593 vs Automatic L888.5
Wearability & Fit
35mm vs 41mm — different wrist presence
Value & Cost of Ownership
Casio is $1,980 more affordable
Water Resistance
30m (Splash Resistant) vs 300m (30 ATM)
Our Verdict
Casio
F-91W
Choose the Casio F-91W if you prioritize Casio Digital Quartz (Battery) engineering, Casio (Japan) craftsmanship, and 30m (Splash Resistant) water resistance. At ~$20, it delivers Quartz Module 593 with 7-Year Battery power reserve.
Check Price on AmazonLongines
HydroConquest Automatic
Choose the Longines HydroConquest Automatic if you value ETA-Based Automatic with Silicon Balance Spring technology, Swiss Made heritage, and 41mm proportions. At ~$2,000, the Automatic L888.5 with 72 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio F-91W and Longines HydroConquest Automatic represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Longines delivers Swiss Made engineering.