Casio Pro Trek PRG601-1 vs Longines HydroConquest Automatic
Casio's timepiece meets Longines's diver
Quick Verdict
The Casio Pro Trek PRG601-1 ($250–$500) offers Tough Solar Quartz (No Battery Change) precision in the tier below the Longines HydroConquest Automatic ($1,500–$2,500). The Pro Trek PRG601-1 measures 51.6mm and is rated 100m (10 ATM). The HydroConquest Automatic counters with Swiss Made craftsmanship and 300m (30 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Casio Pro Trek PRG601-1 | Longines HydroConquest Automatic |
|---|---|---|
| Price | $250–$500 | $1,500–$2,500 |
| Case Size | 51.6mm | 41mm |
| Movement | Tough Solar (Solar Quartz) | Automatic L888.5 |
| Caliber Type | Tough Solar Quartz (No Battery Change) | ETA-Based Automatic with Silicon Balance Spring |
| Power Reserve | 7 Months (Solar, Full Charge); 25 Months Power Save | 72 Hours |
| Water Resistance | 100m (10 ATM) | 300m (30 ATM) |
| Crystal | Mineral Glass | Sapphire with Anti-Reflective Coating |
| Case Material | Bio-Based Resin / Stainless Steel | Stainless Steel |
| Origin | Casio (Japan) | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Longines's approach
The Casio Pro Trek PRG601-1 features a Bio-Based Resin / Stainless Steel case at 51.6mm with Mineral Glass protection. The Longines HydroConquest Automatic offers Stainless Steel construction at 41mm with Sapphire with Anti-Reflective Coating. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Tough Solar (Solar Quartz) vs Automatic L888.5
The Pro Trek PRG601-1 runs the Tough Solar (Solar Quartz) (Tough Solar Quartz (No Battery Change), 7 Months (Solar, Full Charge); 25 Months Power Save power reserve) at standard frequency. The HydroConquest Automatic uses the Automatic L888.5 (ETA-Based Automatic with Silicon Balance Spring, 72 Hours reserve) at 25,200 vph (3.5 Hz). The HydroConquest Automatic offers a longer power reserve.
Wearability & Fit
51.6mm vs 41mm — different wrist presence
At 51.6mm, the Pro Trek PRG601-1 has a bolder wrist presence compared to the HydroConquest Automatic at 41mm. Water resistance differs: 100m (10 ATM) vs 300m (30 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio Pro Trek PRG601-1 sits at $250–$500 and the Longines HydroConquest Automatic at $1,500–$2,500. On the specs that outlast any price: the Pro Trek PRG601-1 uses Mineral Glass with 7 Months (Solar, Full Charge); 25 Months Power Save, against Sapphire with Anti-Reflective Coating and 72 Hours on the HydroConquest Automatic. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 300m (30 ATM)
The Pro Trek PRG601-1 is rated to 100m (10 ATM) while the HydroConquest Automatic handles 300m (30 ATM). The HydroConquest Automatic offers superior water resistance.
Our Verdict
Casio
Pro Trek PRG601-1
Choose the Casio Pro Trek PRG601-1 if you prioritize Tough Solar Quartz (No Battery Change) engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At $250–$500, it delivers Tough Solar (Solar Quartz) with 7 Months (Solar, Full Charge); 25 Months Power Save 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 $1,500–$2,500, the Automatic L888.5 with 72 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio Pro Trek PRG601-1 and Longines HydroConquest Automatic represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Longines delivers Swiss Made engineering.
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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.