Head-to-Head Comparison

Updated September 5, 2026

Casio MRW-230H vs Seiko Presage Cocktail Time SRPE15

Two timepieces compared — Under $50 vs $250–$500

Quick Verdict

The Casio MRW-230H (Under $50) offers Casio Quartz (Battery) precision in the tier below the Seiko Presage Cocktail Time SRPE15 ($250–$500). The MRW-230H measures 44.6mm (47.9 x 44.6 x 12.3mm) and is rated 100m (10 ATM). The Presage Cocktail Time SRPE15 counters with Made in Japan craftsmanship and 50m (5 ATM) water resistance. Both are exceptional timepieces for their respective tiers.

CasioMRW-230HUnder $50 Check price SeikoPresage Cocktail Time SRPE15$250–$500 Check price

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Casio

MRW-230H

Under $50

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Seiko

Presage Cocktail Time SRPE15

$250–$500

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Specifications Compared

Feature	Casio MRW-230H	Seiko Presage Cocktail Time SRPE15
Price	Under $50	$250–$500
Case Size	44.6mm (47.9 x 44.6 x 12.3mm)	40.5mm
Movement	Quartz	Automatic Caliber 4R35
Caliber Type	Casio Quartz (Battery)	Seiko In-House Automatic
Power Reserve	Approx. 3-year battery (SR626SW)	41 Hours
Water Resistance	100m (10 ATM)	50m (5 ATM)
Crystal	Resin Glass	Hardlex Crystal
Case Material	Resin case, aluminum bezel ring	Stainless Steel
Origin	Casio (Japan)	Made in Japan

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Casio's design language vs Seiko'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 Seiko Presage Cocktail Time SRPE15 offers Stainless Steel construction at 40.5mm with Hardlex Crystal. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Seiko

Quartz vs Automatic Caliber 4R35

The MRW-230H runs the Quartz (Casio Quartz (Battery), Approx. 3-year battery (SR626SW) power reserve) at standard frequency. The Presage Cocktail Time SRPE15 uses the Automatic Caliber 4R35 (Seiko In-House Automatic, 41 Hours reserve) at 21,600 vph (3 Hz). The Presage Cocktail Time SRPE15 offers a longer power reserve.

📏

Wearability & Fit

Edge: Seiko

44.6mm (47.9 x 44.6 x 12.3mm) vs 40.5mm — 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 Presage Cocktail Time SRPE15 at 40.5mm. Water resistance differs: 100m (10 ATM) vs 50m (5 ATM).

💰

Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Casio MRW-230H sits at Under $50 and the Seiko Presage Cocktail Time SRPE15 at $250–$500. On the specs that outlast any price: the MRW-230H uses Resin Glass with Approx. 3-year battery (SR626SW), against Hardlex Crystal and 41 Hours on the Presage Cocktail Time SRPE15. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Casio

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

The MRW-230H is rated to 100m (10 ATM) while the Presage Cocktail Time SRPE15 handles 50m (5 ATM). The MRW-230H is better suited for water activities.

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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Seiko

Presage Cocktail Time SRPE15

Choose the Seiko Presage Cocktail Time SRPE15 if you value Seiko In-House Automatic technology, Made in Japan heritage, and 40.5mm proportions. At $250–$500, the Automatic Caliber 4R35 with 41 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Casio MRW-230H and Seiko Presage Cocktail Time SRPE15 represent two distinct approaches to the timepiece category — the Casio bringing Casio (Japan) tradition while Seiko delivers Made in Japan engineering.

Frequently Asked Questions

The Seiko Presage Cocktail Time SRPE15 is the better buy if you want a mechanical movement; the Casio MRW-230H is the better buy if you want quartz accuracy with no servicing. For water, the Casio MRW-230H 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 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 Seiko Presage Cocktail Time SRPE15 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 Presage Cocktail Time SRPE15 at 40.5mm with 50m (5 ATM) is similarly capable. The MRW-230H uses Resin Glass while the Presage Cocktail Time SRPE15 uses Hardlex 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.