Head-to-Head Comparison

Updated September 5, 2026

Casio MTP-S120L Solar Field vs Frederique Constant Classic Quartz Moonphase

Casio's field watch meets Frederique Constant's dress watch

Quick Verdict

The Casio MTP-S120L Solar Field ($100–$150) offers Casio Tough Solar Quartz precision in the tier below the Frederique Constant Classic Quartz Moonphase ($1,000–$1,500). The MTP-S120L Solar Field measures 42mm (49 x 42 x 10.9mm) and is rated 100m (10 ATM). The Classic Quartz Moonphase counters with Swiss Made craftsmanship and 50m (5 ATM) water resistance. Both are exceptional watches for their respective tiers.

CasioMTP-S120L Solar Field$100–$150 Check price Frederique ConstantClassic Quartz Moonphase$1,000–$1,500 Check price

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Casio

MTP-S120L Solar Field

$100–$150

Check Price Full Review

Frederique Constant

Classic Quartz Moonphase

$1,000–$1,500

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Specifications Compared

Feature	Casio MTP-S120L Solar Field	Frederique Constant Classic Quartz Moonphase
Price	$100–$150	$1,000–$1,500
Case Size	42mm (49 x 42 x 10.9mm)	40mm
Movement	Solar-Powered Quartz	Quartz FC-206
Caliber Type	Casio Tough Solar Quartz	Swiss Quartz
Power Reserve	Months on a full solar charge; no battery replacement	Battery
Water Resistance	100m (10 ATM)	50m (5 ATM)
Crystal	Mineral Crystal	Anti-Reflective Sapphire Crystal
Case Material	Stainless Steel	Stainless Steel
Origin	Casio (Japan)	Swiss Made

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Casio's design language vs Frederique Constant'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 Frederique Constant Classic Quartz Moonphase offers Stainless Steel construction at 40mm with Anti-Reflective Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Draw

Solar-Powered Quartz vs Quartz FC-206

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 Classic Quartz Moonphase uses the Quartz FC-206 (Swiss Quartz, Battery reserve) at standard. Power reserves are closely matched.

📏

Wearability & Fit

Edge: Frederique Constant

42mm (49 x 42 x 10.9mm) vs 40mm — different wrist presence

At 42mm (49 x 42 x 10.9mm), the MTP-S120L Solar Field has a bolder wrist presence compared to the Classic Quartz Moonphase at 40mm. Water resistance differs: 100m (10 ATM) vs 50m (5 ATM).

💰

Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Casio MTP-S120L Solar Field sits at $100–$150 and the Frederique Constant Classic Quartz Moonphase at $1,000–$1,500. 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 Anti-Reflective Sapphire Crystal and Battery on the Classic Quartz Moonphase. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Casio

100m (10 ATM) vs 50m (5 ATM)

The MTP-S120L Solar Field is rated to 100m (10 ATM) while the Classic Quartz Moonphase handles 50m (5 ATM). The MTP-S120L Solar Field is better suited for water activities.

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.

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Frederique Constant

Classic Quartz Moonphase

Choose the Frederique Constant Classic Quartz Moonphase if you value Swiss Quartz technology, Swiss Made heritage, and 40mm proportions. At $1,000–$1,500, the Quartz FC-206 with Battery power reserve makes it a compelling choice.

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The Bottom Line

The Casio MTP-S120L Solar Field and Frederique Constant Classic Quartz Moonphase represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Frederique Constant delivers Swiss Made engineering.

Frequently Asked Questions

For water, the Casio MTP-S120L Solar Field is rated 100 m against 50 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Casio MTP-S120L Solar Field sits a band lower ($100–$150 against $1,000–$1,500), so it is the cheaper way into the category. Neither is better at everything; the spec table above shows movement, case size, water resistance and crystal side by side so you can weigh what matters to you. We do not test units, so this is the makers' data, not a bench result.

The Casio MTP-S120L Solar Field offers better upfront value, sitting a tier lower at $100–$150. However, the Frederique Constant Classic Quartz Moonphase may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The MTP-S120L Solar Field at 42mm (49 x 42 x 10.9mm) with 100m (10 ATM) water resistance handles everyday situations. The Classic Quartz Moonphase at 40mm with 50m (5 ATM) is similarly capable. The MTP-S120L Solar Field uses Mineral Crystal while the Classic Quartz Moonphase uses Anti-Reflective Sapphire Crystal. Sapphire resists scratches noticeably better than mineral glass.

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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.