Head-to-Head Comparison

Updated September 5, 2026

Casio MRW-230H vs Casio MTP-S120L Solar Field

Casio's timepiece meets Casio's field watch

Quick Verdict

The Casio MRW-230H (Under $50) offers Casio Quartz (Battery) precision in the tier below the Casio MTP-S120L Solar Field ($100–$150). The MRW-230H measures 44.6mm (47.9 x 44.6 x 12.3mm) and is rated 100m (10 ATM). The MTP-S120L Solar Field counters with Casio (Japan) craftsmanship and 100m (10 ATM) water resistance. Both are exceptional watches for their respective tiers.

CasioMRW-230HUnder $50 Check price CasioMTP-S120L Solar Field$100–$150 Check price

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Casio

MRW-230H

Under $50

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Casio

MTP-S120L Solar Field

$100–$150

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Specifications Compared

Feature	Casio MRW-230H	Casio MTP-S120L Solar Field
Price	Under $50	$100–$150
Case Size	44.6mm (47.9 x 44.6 x 12.3mm)	42mm (49 x 42 x 10.9mm)
Movement	Quartz	Solar-Powered Quartz
Caliber Type	Casio Quartz (Battery)	Casio Tough Solar Quartz
Power Reserve	Approx. 3-year battery (SR626SW)	Months on a full solar charge; no battery replacement
Water Resistance	100m (10 ATM)	100m (10 ATM)
Crystal	Resin Glass	Mineral Crystal
Case Material	Resin case, aluminum bezel ring	Stainless Steel
Origin	Casio (Japan)	Casio (Japan)

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Casio's design language vs Casio's approach

The Casio MRW-230H features a Resin case, aluminum bezel ring case at 44.6mm (47.9 x 44.6 x 12.3mm) with Resin Glass protection. The Casio MTP-S120L Solar Field offers Stainless Steel construction at 42mm (49 x 42 x 10.9mm) with Mineral Crystal. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Draw

Quartz vs Solar-Powered Quartz

The MRW-230H runs the Quartz (Casio Quartz (Battery), Approx. 3-year battery (SR626SW) power reserve) at standard frequency. The MTP-S120L Solar Field uses the Solar-Powered Quartz (Casio Tough Solar Quartz, Months on a full solar charge; no battery replacement reserve) at standard. Power reserves are closely matched.

📏

Wearability & Fit

Edge: Casio

44.6mm (47.9 x 44.6 x 12.3mm) vs 42mm (49 x 42 x 10.9mm) — different wrist presence

At 44.6mm (47.9 x 44.6 x 12.3mm), the MRW-230H has a bolder wrist presence compared to the MTP-S120L Solar Field at 42mm (49 x 42 x 10.9mm). Water resistance differs: 100m (10 ATM) vs 100m (10 ATM).

💰

Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Casio MRW-230H sits at Under $50 and the Casio MTP-S120L Solar Field at $100–$150. On the specs that outlast any price: the MRW-230H uses Resin Glass with Approx. 3-year battery (SR626SW), against Mineral Crystal and Months on a full solar charge; no battery replacement on the MTP-S120L Solar Field. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Draw

100m (10 ATM) vs 100m (10 ATM)

The MRW-230H is rated to 100m (10 ATM) while the MTP-S120L Solar Field handles 100m (10 ATM). Both offer identical water resistance ratings.

Our Verdict

Casio

MRW-230H

Choose the Casio MRW-230H if you prioritize Casio Quartz (Battery) engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At Under $50, it delivers Quartz with Approx. 3-year battery (SR626SW) power reserve.

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Casio

MTP-S120L Solar Field

Choose the Casio MTP-S120L Solar Field if you value Casio Tough Solar Quartz technology, Casio (Japan) heritage, and 42mm (49 x 42 x 10.9mm) proportions. At $100–$150, the Solar-Powered Quartz with Months on a full solar charge; no battery replacement power reserve makes it a compelling choice.

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The Bottom Line

The Casio MRW-230H and Casio MTP-S120L Solar Field represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Casio delivers Casio (Japan) engineering.

Frequently Asked Questions

On price, the Casio MRW-230H sits a band lower (Under $50 against $100–$150), 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 MRW-230H offers better upfront value, sitting a tier lower at Under $50. However, the Casio MTP-S120L Solar Field may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The MRW-230H at 44.6mm (47.9 x 44.6 x 12.3mm) with 100m (10 ATM) water resistance handles everyday situations. The MTP-S120L Solar Field at 42mm (49 x 42 x 10.9mm) with 100m (10 ATM) is similarly capable. The MRW-230H uses Resin Glass while the MTP-S120L Solar Field uses Mineral Crystal.

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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.