Casio Pro Trek PRG601-1 vs Invicta Pro Diver Automatic 23681
Casio's timepiece meets Invicta's diver
Quick Verdict
The Invicta Pro Diver Automatic 23681 ($50–$100) delivers Automatic (Seiko NH35A) technology in the tier below the Casio Pro Trek PRG601-1 ($250–$500). The Pro Diver Automatic 23681 measures 40mm and is rated 200m. The Pro Trek PRG601-1 justifies its premium with Casio (Japan) heritage and Tough Solar (Solar Quartz). Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Casio Pro Trek PRG601-1 | Invicta Pro Diver Automatic 23681 |
|---|---|---|
| Price | $250–$500 | $50–$100 |
| Case Size | 51.6mm | 40mm |
| Movement | Tough Solar (Solar Quartz) | Automatic NH35A |
| Caliber Type | Tough Solar Quartz (No Battery Change) | Automatic (Seiko NH35A) |
| Power Reserve | 7 Months (Solar, Full Charge); 25 Months Power Save | — |
| Water Resistance | 100m (10 ATM) | 200m |
| Crystal | Mineral Glass | Mineral Glass |
| Case Material | Bio-Based Resin / Stainless Steel | — |
| Origin | Casio (Japan) | Invicta (Japanese movement) |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Invicta's approach
The Casio Pro Trek PRG601-1 features a Bio-Based Resin / Stainless Steel case at 51.6mm with Mineral Glass protection. The Invicta Pro Diver Automatic 23681 offers steel construction at 40mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Tough Solar (Solar Quartz) vs Automatic NH35A
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 Pro Diver Automatic 23681 uses the Automatic NH35A (Automatic (Seiko NH35A), standard reserve) at standard. The Pro Trek PRG601-1 edges ahead on power reserve.
Wearability & Fit
51.6mm vs 40mm — different wrist presence
At 51.6mm, the Pro Trek PRG601-1 has a bolder wrist presence compared to the Pro Diver Automatic 23681 at 40mm. Water resistance differs: 100m (10 ATM) vs 200m.
Value & Cost of Ownership
Invicta sits in the lower tier
The Casio Pro Trek PRG601-1 sits at $250–$500 and the Invicta Pro Diver Automatic 23681 at $50–$100. 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 Mineral Glass and a standard reserve on the Pro Diver Automatic 23681. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 200m
The Pro Trek PRG601-1 is rated to 100m (10 ATM) while the Pro Diver Automatic 23681 handles 200m. The Pro Diver Automatic 23681 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 AmazonInvicta
Pro Diver Automatic 23681
Choose the Invicta Pro Diver Automatic 23681 if you value Automatic (Seiko NH35A) technology, Invicta (Japanese movement) heritage, and 40mm proportions. At $50–$100, the Automatic NH35A with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio Pro Trek PRG601-1 and Invicta Pro Diver Automatic 23681 represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Invicta delivers Invicta (Japanese movement) engineering.
Frequently Asked Questions
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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.