Head-to-Head Comparison

Updated September 5, 2026

Casio MRW-230H vs Citizen Promaster Skyhawk A-T

Casio's timepiece meets Citizen's chronograph

Quick Verdict

The Casio MRW-230H (Under $50) offers Casio Quartz (Battery) precision in the tier below the Citizen Promaster Skyhawk A-T ($500–$1,000). The MRW-230H measures 44.6mm (47.9 x 44.6 x 12.3mm) 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.

CasioMRW-230HUnder $50 Check price CitizenPromaster Skyhawk A-T$500–$1,000 Check price

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Casio

MRW-230H

Under $50

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Citizen

Promaster Skyhawk A-T

$500–$1,000

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Specifications Compared

Feature	Casio MRW-230H	Citizen Promaster Skyhawk A-T
Price	Under $50	$500–$1,000
Case Size	44.6mm (47.9 x 44.6 x 12.3mm)	45mm
Movement	Quartz	Eco-Drive (Radio-Controlled, Atomic Timekeeping)
Caliber Type	Casio Quartz (Battery)	Citizen Eco-Drive U680 (Solar + Radio-Controlled)
Power Reserve	Approx. 3-year battery (SR626SW)	—
Water Resistance	100m (10 ATM)	200m (20 ATM)
Crystal	Resin Glass	Sapphire Crystal
Case Material	Resin case, aluminum bezel ring	Stainless Steel (Black Ion-Plated)
Origin	Casio (Japan)	Made in Japan

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Casio's design language vs Citizen'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 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

Edge: Draw

Quartz vs Eco-Drive (Radio-Controlled, Atomic Timekeeping)

The MRW-230H runs the Quartz (Casio Quartz (Battery), Approx. 3-year battery (SR626SW) 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

Edge: Casio

44.6mm (47.9 x 44.6 x 12.3mm) vs 45mm — different wrist presence

At 44.6mm (47.9 x 44.6 x 12.3mm), the MRW-230H 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

Edge: Casio

Casio sits in the lower tier

The Casio MRW-230H sits at Under $50 and the Citizen Promaster Skyhawk A-T at $500–$1,000. On the specs that outlast any price: the MRW-230H uses Resin Glass with Approx. 3-year battery (SR626SW), against Sapphire Crystal and a standard reserve on the Promaster Skyhawk A-T. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Citizen

100m (10 ATM) vs 200m (20 ATM)

The MRW-230H 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

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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Citizen

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.

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The Bottom Line

The Casio MRW-230H 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

For water, the Citizen Promaster Skyhawk A-T is rated 200 m against 100 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Casio MRW-230H sits a band lower (Under $50 against $500–$1,000), 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 Citizen Promaster Skyhawk A-T 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 Promaster Skyhawk A-T at 45mm with 200m (20 ATM) is similarly capable. The MRW-230H uses Resin Glass while the Promaster Skyhawk A-T uses Sapphire 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.