Casio MTP-S120L Solar Field vs Casio Pro Trek PRW3500T-7
Casio's field watch meets Casio's diver
Quick Verdict
The Casio MTP-S120L Solar Field ($100–$150) offers Casio Tough Solar Quartz precision in the tier below the Casio Pro Trek PRW3500T-7 ($250–$500). The MTP-S120L Solar Field measures 44.5mm and is rated 100m (10 ATM). The Pro Trek PRW3500T-7 counters with Casio (Japan) craftsmanship and 200m (20 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Casio MTP-S120L Solar Field | Casio Pro Trek PRW3500T-7 |
|---|---|---|
| Price | $100–$150 | $250–$500 |
| Case Size | 44.5mm | 56.9 × 53.4 × 14.8mm |
| Movement | Solar-Powered Quartz | Tough Solar (Solar Quartz), Radio-Controlled |
| Caliber Type | Casio Tough Solar Quartz | Tough Solar Quartz, Multi-Band 6 |
| Power Reserve | Months on a full solar charge; no battery replacement | Tough Solar (Rechargeable) |
| Water Resistance | 100m (10 ATM) | 200m (20 ATM) |
| Crystal | Mineral Crystal | Mineral Glass |
| Case Material | Stainless Steel | Resin / Stainless Steel, Titanium Bracelet |
| Origin | Casio (Japan) | Casio (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Casio's approach
The Casio MTP-S120L Solar Field features a Stainless Steel case at 44.5mm with Mineral Crystal protection. The Casio Pro Trek PRW3500T-7 offers Resin / Stainless Steel, Titanium Bracelet construction at 56.9 × 53.4 × 14.8mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Solar-Powered Quartz vs Tough Solar (Solar Quartz), Radio-Controlled
The MTP-S120L Solar Field runs the Solar-Powered Quartz (Casio Tough Solar Quartz, Months on a full solar charge; no battery replacement power reserve) at standard frequency. The Pro Trek PRW3500T-7 uses the Tough Solar (Solar Quartz), Radio-Controlled (Tough Solar Quartz, Multi-Band 6, Tough Solar (Rechargeable) reserve) at standard. Power reserves are closely matched.
Wearability & Fit
44.5mm vs 56.9 × 53.4 × 14.8mm — different wrist presence
At 44.5mm, the MTP-S120L Solar Field wears more compactly on smaller wrists compared to the Pro Trek PRW3500T-7 at 56.9 × 53.4 × 14.8mm. Water resistance differs: 100m (10 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio MTP-S120L Solar Field sits at $100–$150 and the Casio Pro Trek PRW3500T-7 at $250–$500. On the specs that outlast any price: the MTP-S120L Solar Field uses Mineral Crystal with Months on a full solar charge; no battery replacement, against Mineral Glass and Tough Solar (Rechargeable) on the Pro Trek PRW3500T-7. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 200m (20 ATM)
The MTP-S120L Solar Field is rated to 100m (10 ATM) while the Pro Trek PRW3500T-7 handles 200m (20 ATM). The Pro Trek PRW3500T-7 offers superior water resistance.
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 AmazonCasio
Pro Trek PRW3500T-7
Choose the Casio Pro Trek PRW3500T-7 if you value Tough Solar Quartz, Multi-Band 6 technology, Casio (Japan) heritage, and 56.9 × 53.4 × 14.8mm proportions. At $250–$500, the Tough Solar (Solar Quartz), Radio-Controlled with Tough Solar (Rechargeable) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio MTP-S120L Solar Field and Casio Pro Trek PRW3500T-7 represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Casio delivers Casio (Japan) 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.