Head-to-Head Comparison

Updated September 5, 2026

Casio MRW-230H vs Casio Pro Trek PRW3500T-7

Casio's timepiece meets Casio's diver

Quick Verdict

The Casio MRW-230H (Under $50) offers Casio Quartz (Battery) precision in the tier below the Casio Pro Trek PRW3500T-7 ($250–$500). The MRW-230H measures 44.6mm (47.9 x 44.6 x 12.3mm) and is rated 100m (10 ATM). The Pro Trek PRW3500T-7 counters with Casio (Japan) craftsmanship and 200m (20 ATM) water resistance. Both are exceptional watches for their respective tiers.

CasioMRW-230HUnder $50 Check price CasioPro Trek PRW3500T-7$250–$500 Check price

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Casio

MRW-230H

Under $50

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Casio

Pro Trek PRW3500T-7

$250–$500

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Specifications Compared

Feature	Casio MRW-230H	Casio Pro Trek PRW3500T-7
Price	Under $50	$250–$500
Case Size	44.6mm (47.9 x 44.6 x 12.3mm)	56.9 × 53.4 × 14.8mm
Movement	Quartz	Tough Solar (Solar Quartz), Radio-Controlled
Caliber Type	Casio Quartz (Battery)	Tough Solar Quartz, Multi-Band 6
Power Reserve	Approx. 3-year battery (SR626SW)	Tough Solar (Rechargeable)
Water Resistance	100m (10 ATM)	200m (20 ATM)
Crystal	Resin Glass	Mineral Glass
Case Material	Resin case, aluminum bezel ring	Resin / Stainless Steel, Titanium Bracelet
Origin	Casio (Japan)	Casio (Japan)

Category-by-Category Analysis

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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 Pro Trek PRW3500T-7 offers Resin / Stainless Steel, Titanium Bracelet construction at 56.9 × 53.4 × 14.8mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Draw

Quartz vs Tough Solar (Solar Quartz), Radio-Controlled

The MRW-230H runs the Quartz (Casio Quartz (Battery), Approx. 3-year battery (SR626SW) power reserve) at standard frequency. The Pro Trek PRW3500T-7 uses the Tough Solar (Solar Quartz), Radio-Controlled (Tough Solar Quartz, Multi-Band 6, Tough Solar (Rechargeable) reserve) at standard. Power reserves are closely matched.

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Wearability & Fit

Edge: Casio

44.6mm (47.9 x 44.6 x 12.3mm) vs 56.9 × 53.4 × 14.8mm — 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 Pro Trek PRW3500T-7 at 56.9 × 53.4 × 14.8mm. 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 Casio Pro Trek PRW3500T-7 at $250–$500. On the specs that outlast any price: the MRW-230H uses Resin Glass with Approx. 3-year battery (SR626SW), against Mineral Glass and Tough Solar (Rechargeable) on the Pro Trek PRW3500T-7. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Casio

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

The MRW-230H is rated to 100m (10 ATM) while the Pro Trek PRW3500T-7 handles 200m (20 ATM). The Pro Trek PRW3500T-7 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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Casio

Pro Trek PRW3500T-7

Choose the Casio Pro Trek PRW3500T-7 if you value Tough Solar Quartz, Multi-Band 6 technology, Casio (Japan) heritage, and 56.9 × 53.4 × 14.8mm proportions. At $250–$500, the Tough Solar (Solar Quartz), Radio-Controlled with Tough Solar (Rechargeable) power reserve makes it a compelling choice.

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The Bottom Line

The Casio MRW-230H and Casio Pro Trek PRW3500T-7 represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Casio delivers Casio (Japan) engineering.

Frequently Asked Questions

For water, the Casio Pro Trek PRW3500T-7 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 $250–$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 MRW-230H offers better upfront value, sitting a tier lower at Under $50. However, the Casio Pro Trek PRW3500T-7 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 Pro Trek PRW3500T-7 at 56.9 × 53.4 × 14.8mm with 200m (20 ATM) is similarly capable. The MRW-230H uses Resin Glass while the Pro Trek PRW3500T-7 uses 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.