Casio Pro Trek PRG601-1 vs Frederique Constant Slimline Moonphase Manufacture
Casio's timepiece meets Frederique Constant's dress watch
Quick Verdict
The Casio Pro Trek PRG601-1 ($250–$500) offers Tough Solar Quartz (No Battery Change) precision in the tier below the Frederique Constant Slimline Moonphase Manufacture ($2,500–$5,000). The Pro Trek PRG601-1 measures 51.6mm and is rated 100m (10 ATM). The Slimline Moonphase Manufacture counters with Swiss Made craftsmanship and 30m (3 ATM) water resistance. Both are exceptional watches for their respective tiers.
Transparency — We earn a small commission on purchases made through our Amazon links. This doesn't affect our editorial independence.
Specifications Compared
| Feature | Casio Pro Trek PRG601-1 | Frederique Constant Slimline Moonphase Manufacture |
|---|---|---|
| Price | $250–$500 | $2,500–$5,000 |
| Case Size | 51.6mm | 42mm |
| Movement | Tough Solar (Solar Quartz) | Automatic FC-705 (In-House) |
| Caliber Type | Tough Solar Quartz (No Battery Change) | In-House Automatic Manufacture |
| Power Reserve | 7 Months (Solar, Full Charge); 25 Months Power Save | 42 Hours |
| Water Resistance | 100m (10 ATM) | 30m (3 ATM) |
| Crystal | Mineral Glass | Convex Sapphire |
| 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 Frederique Constant's approach
The Casio Pro Trek PRG601-1 features a Bio-Based Resin / Stainless Steel case at 51.6mm with Mineral Glass protection. The Frederique Constant Slimline Moonphase Manufacture offers Stainless Steel construction at 42mm with Convex Sapphire. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Tough Solar (Solar Quartz) vs Automatic FC-705 (In-House)
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 Slimline Moonphase Manufacture uses the Automatic FC-705 (In-House) (In-House Automatic Manufacture, 42 Hours reserve) at 28,800 vph (4 Hz). The Slimline Moonphase Manufacture offers a longer power reserve.
Wearability & Fit
51.6mm vs 42mm — different wrist presence
At 51.6mm, the Pro Trek PRG601-1 has a bolder wrist presence compared to the Slimline Moonphase Manufacture at 42mm. Water resistance differs: 100m (10 ATM) vs 30m (3 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio Pro Trek PRG601-1 sits at $250–$500 and the Frederique Constant Slimline Moonphase Manufacture at $2,500–$5,000. 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 Convex Sapphire and 42 Hours on the Slimline Moonphase Manufacture. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 30m (3 ATM)
The Pro Trek PRG601-1 is rated to 100m (10 ATM) while the Slimline Moonphase Manufacture handles 30m (3 ATM). The Pro Trek PRG601-1 is better suited for water activities.
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 AmazonFrederique Constant
Slimline Moonphase Manufacture
Choose the Frederique Constant Slimline Moonphase Manufacture if you value In-House Automatic Manufacture technology, Swiss Made heritage, and 42mm proportions. At $2,500–$5,000, the Automatic FC-705 (In-House) with 42 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio Pro Trek PRG601-1 and Frederique Constant Slimline Moonphase Manufacture represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Frederique Constant delivers Swiss Made engineering.
Frequently Asked Questions
More Comparisons
Frederique Constant Slimline Moonphase vs Longines Master Moonphase
Two moonphase dress watches under $5,000
Tag Heuer Carrera Chronograph vs Casio Pro Trek PRG601-1
Tag Heuer's chronograph meets Casio's timepiece
Tag Heuer Carrera Chronograph vs Frederique Constant Slimline Moonphase Manufacture
Tag Heuer's chronograph meets Frederique Constant's dress watch
Explore These Watches
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.