Updated
Casio MTP-S120L Solar Field vs Citizen Promaster Skyhawk A-T
Casio's field watch meets Citizen's chronograph
Quick Verdict
The Casio MTP-S120L Solar Field ($100–$150) offers Casio Tough Solar Quartz precision in the tier below the Citizen Promaster Skyhawk A-T ($500–$1,000). The MTP-S120L Solar Field measures 42mm (49 x 42 x 10.9mm) and is rated 100m (10 ATM). The Promaster Skyhawk A-T counters with Made in Japan craftsmanship and 200m (20 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 MTP-S120L Solar Field | Citizen Promaster Skyhawk A-T |
|---|---|---|
| Price | $100–$150 | $500–$1,000 |
| Case Size | 42mm (49 x 42 x 10.9mm) | 45mm |
| Movement | Solar-Powered Quartz | Eco-Drive (Radio-Controlled, Atomic Timekeeping) |
| Caliber Type | Casio Tough Solar Quartz | Citizen Eco-Drive U680 (Solar + Radio-Controlled) |
| Power Reserve | Months on a full solar charge; no battery replacement | — |
| Water Resistance | 100m (10 ATM) | 200m (20 ATM) |
| Crystal | Mineral Crystal | Sapphire Crystal |
| Case Material | Stainless Steel | Stainless Steel (Black Ion-Plated) |
| Origin | Casio (Japan) | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Citizen's approach
The Casio MTP-S120L Solar Field features a Stainless Steel case at 42mm (49 x 42 x 10.9mm) with Mineral Crystal protection. The Citizen Promaster Skyhawk A-T offers Stainless Steel (Black Ion-Plated) construction at 45mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Solar-Powered Quartz vs Eco-Drive (Radio-Controlled, Atomic Timekeeping)
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 Promaster Skyhawk A-T uses the Eco-Drive (Radio-Controlled, Atomic Timekeeping) (Citizen Eco-Drive U680 (Solar + Radio-Controlled), standard reserve) at standard. Power reserves are closely matched.
Wearability & Fit
42mm (49 x 42 x 10.9mm) vs 45mm — different wrist presence
At 42mm (49 x 42 x 10.9mm), the MTP-S120L Solar Field wears more compactly on smaller wrists compared to the Promaster Skyhawk A-T at 45mm. 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 Citizen Promaster Skyhawk A-T at $500–$1,000. 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 Sapphire Crystal and a standard reserve on the Promaster Skyhawk A-T. 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 Promaster Skyhawk A-T handles 200m (20 ATM). The Promaster Skyhawk A-T 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 AmazonCitizen
Promaster Skyhawk A-T
Choose the Citizen Promaster Skyhawk A-T if you value Citizen Eco-Drive U680 (Solar + Radio-Controlled) technology, Made in Japan heritage, and 45mm proportions. At $500–$1,000, the Eco-Drive (Radio-Controlled, Atomic Timekeeping) with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio MTP-S120L Solar Field and Citizen Promaster Skyhawk A-T represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Citizen delivers Made in Japan engineering.
Frequently Asked Questions
More Comparisons
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.