Head-to-Head Comparison

Updated September 5, 2026

Blancpain Fifty Fathoms 45mm (titanium, blue dial) vs Casio MRW-230H

Blancpain's diver meets Casio's timepiece

Quick Verdict

The Casio MRW-230H (Under $50) delivers Casio Quartz (Battery) technology in the tier below the Blancpain Fifty Fathoms 45mm (titanium, blue dial) ($10,000–$25,000). The MRW-230H measures 44.6mm (47.9 x 44.6 x 12.3mm) and is rated 100m (10 ATM). The Fifty Fathoms 45mm (titanium, blue dial) justifies its premium with Swiss Made heritage and Automatic, Blancpain Calibre 1315. Both represent excellent choices in the luxury watch category.

BlancpainFifty Fathoms 45mm (titanium, blue dial)$10,000–$25,000 Check price CasioMRW-230HUnder $50 Check price

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Blancpain

Fifty Fathoms 45mm (titanium, blue dial)

$10,000–$25,000

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Casio

MRW-230H

Under $50

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Specifications Compared

Feature	Blancpain Fifty Fathoms 45mm (titanium, blue dial)	Casio MRW-230H
Price	$10,000–$25,000	Under $50
Case Size	45mm	44.6mm (47.9 x 44.6 x 12.3mm)
Movement	Automatic, Blancpain Calibre 1315	Quartz
Caliber Type	Blancpain 1315, three barrels, silicon balance spring	Casio Quartz (Battery)
Power Reserve	About 120 hours (five days)	Approx. 3-year battery (SR626SW)
Water Resistance	300m (30 ATM)	100m (10 ATM)
Crystal	Sapphire Crystal, sapphire bezel insert	Resin Glass
Case Material	Titanium	Resin case, aluminum bezel ring
Origin	Swiss Made	Casio (Japan)

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Blancpain's design language vs Casio's approach

The Blancpain Fifty Fathoms 45mm (titanium, blue dial) features a Titanium case at 45mm with Sapphire Crystal, sapphire bezel insert protection. The Casio MRW-230H offers Resin case, aluminum bezel ring construction at 44.6mm (47.9 x 44.6 x 12.3mm) with Resin Glass. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Casio

Automatic, Blancpain Calibre 1315 vs Quartz

The Fifty Fathoms 45mm (titanium, blue dial) runs the Automatic, Blancpain Calibre 1315 (Blancpain 1315, three barrels, silicon balance spring, About 120 hours (five days) power reserve) at standard frequency. The MRW-230H uses the Quartz (Casio Quartz (Battery), Approx. 3-year battery (SR626SW) reserve) at standard. The MRW-230H offers a longer power reserve.

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Wearability & Fit

Edge: Casio

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

At 45mm, the Fifty Fathoms 45mm (titanium, blue dial) has a bolder wrist presence compared to the MRW-230H at 44.6mm (47.9 x 44.6 x 12.3mm). Water resistance differs: 300m (30 ATM) vs 100m (10 ATM).

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Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Blancpain Fifty Fathoms 45mm (titanium, blue dial) sits at $10,000–$25,000 and the Casio MRW-230H at Under $50. On the specs that outlast any price: the Fifty Fathoms 45mm (titanium, blue dial) uses Sapphire Crystal, sapphire bezel insert with About 120 hours (five days), against Resin Glass and Approx. 3-year battery (SR626SW) on the MRW-230H. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Blancpain

300m (30 ATM) vs 100m (10 ATM)

The Fifty Fathoms 45mm (titanium, blue dial) is rated to 300m (30 ATM) while the MRW-230H handles 100m (10 ATM). The Fifty Fathoms 45mm (titanium, blue dial) is better suited for water activities.

Our Verdict

Blancpain

Fifty Fathoms 45mm (titanium, blue dial)

Choose the Blancpain Fifty Fathoms 45mm (titanium, blue dial) if you prioritize Blancpain 1315, three barrels, silicon balance spring engineering, Swiss Made craftsmanship, and 300m (30 ATM) water resistance. At $10,000–$25,000, it delivers Automatic, Blancpain Calibre 1315 with About 120 hours (five days) power reserve.

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Casio

MRW-230H

Choose the Casio MRW-230H if you value Casio Quartz (Battery) technology, Casio (Japan) heritage, and 44.6mm (47.9 x 44.6 x 12.3mm) proportions. At Under $50, the Quartz with Approx. 3-year battery (SR626SW) power reserve makes it a compelling choice.

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The Bottom Line

The Blancpain Fifty Fathoms 45mm (titanium, blue dial) and Casio MRW-230H represent two distinct approaches to fine watchmaking — the Blancpain bringing Swiss Made tradition while Casio delivers Casio (Japan) engineering.

Frequently Asked Questions

The Blancpain Fifty Fathoms 45mm (titanium, blue dial) 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 Blancpain Fifty Fathoms 45mm (titanium, blue dial) is rated 300 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 $10,000–$25,000), 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 Blancpain Fifty Fathoms 45mm (titanium, blue dial) may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Fifty Fathoms 45mm (titanium, blue dial) at 45mm with 300m (30 ATM) water resistance handles everyday situations. The MRW-230H at 44.6mm (47.9 x 44.6 x 12.3mm) with 100m (10 ATM) is similarly capable. The Fifty Fathoms 45mm (titanium, blue dial) uses Sapphire Crystal, sapphire bezel insert while the MRW-230H uses Resin 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.