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Casio MTP-S120L Solar Field vs Citizen Promaster Air Nighthawk
Casio's field watch meets Citizen's diver
Quick Verdict
The Casio MTP-S120L Solar Field ($100–$150) offers Casio Tough Solar Quartz precision in the tier below the Citizen Promaster Air Nighthawk ($250–$500). The MTP-S120L Solar Field measures 42mm (49 x 42 x 10.9mm) and is rated 100m (10 ATM). The Promaster Air Nighthawk counters with Citizen (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 | Citizen Promaster Air Nighthawk |
|---|---|---|
| Price | $100–$150 | $250–$500 |
| Case Size | 42mm (49 x 42 x 10.9mm) | 42mm |
| Movement | Solar-Powered Quartz | Eco-Drive Caliber B877 |
| Caliber Type | Casio Tough Solar Quartz | Eco-Drive Solar Quartz (No Battery Change) |
| Power Reserve | Months on a full solar charge; no battery replacement | 6 Months (Solar, Full Charge) |
| Water Resistance | 100m (10 ATM) | 200m (20 ATM) |
| Crystal | Mineral Crystal | Mineral Glass |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Casio (Japan) | Citizen (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 Air Nighthawk offers Stainless Steel construction at 42mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Solar-Powered Quartz vs Eco-Drive Caliber B877
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 Air Nighthawk uses the Eco-Drive Caliber B877 (Eco-Drive Solar Quartz (No Battery Change), 6 Months (Solar, Full Charge) reserve) at standard. The Promaster Air Nighthawk offers a longer power reserve.
Wearability & Fit
42mm (49 x 42 x 10.9mm) vs 42mm — different wrist presence
At 42mm (49 x 42 x 10.9mm), the MTP-S120L Solar Field is similarly sized compared to the Promaster Air Nighthawk at 42mm. 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 Air Nighthawk 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 6 Months (Solar, Full Charge) on the Promaster Air Nighthawk. 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 Air Nighthawk handles 200m (20 ATM). The Promaster Air Nighthawk 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 Air Nighthawk
Choose the Citizen Promaster Air Nighthawk if you value Eco-Drive Solar Quartz (No Battery Change) technology, Citizen (Japan) heritage, and 42mm proportions. At $250–$500, the Eco-Drive Caliber B877 with 6 Months (Solar, Full Charge) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio MTP-S120L Solar Field and Citizen Promaster Air Nighthawk represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Citizen delivers Citizen (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.