Head-to-Head Comparison

Updated September 5, 2026

Breitling Navitimer B01 vs Casio MRW-230H

Breitling's chronograph meets Casio's timepiece

Quick Verdict

The Casio MRW-230H (Under $50) delivers Casio Quartz (Battery) technology in the tier below the Breitling Navitimer B01 ($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 Navitimer B01 justifies its premium with Swiss Made heritage and Automatic Breitling 01 (Manufacture). Both represent excellent choices in the luxury watch category.

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Breitling

Navitimer B01

$10,000–$25,000

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Casio

MRW-230H

Under $50

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Specifications Compared

Feature	Breitling Navitimer B01	Casio MRW-230H
Price	$10,000–$25,000	Under $50
Case Size	43mm	44.6mm (47.9 x 44.6 x 12.3mm)
Movement	Automatic Breitling 01 (Manufacture)	Quartz
Caliber Type	In-House Automatic Chronograph Manufacture	Casio Quartz (Battery)
Power Reserve	70 Hours	Approx. 3-year battery (SR626SW)
Water Resistance	30m (3 ATM)	100m (10 ATM)
Crystal	Cambered Sapphire	Resin Glass
Case Material	Stainless Steel	Resin case, aluminum bezel ring
Origin	Swiss Made	Casio (Japan)

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Breitling's design language vs Casio's approach

The Breitling Navitimer B01 features a Stainless Steel case at 43mm with Cambered Sapphire 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.

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Movement & Performance

Edge: Casio

Automatic Breitling 01 (Manufacture) vs Quartz

The Navitimer B01 runs the Automatic Breitling 01 (Manufacture) (In-House Automatic Chronograph Manufacture, 70 Hours power reserve) at 28,800 vph (4 Hz) 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: Breitling

43mm vs 44.6mm (47.9 x 44.6 x 12.3mm) — different wrist presence

At 43mm, the Navitimer B01 wears more compactly on smaller wrists compared to the MRW-230H at 44.6mm (47.9 x 44.6 x 12.3mm). Water resistance differs: 30m (3 ATM) vs 100m (10 ATM).

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Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Breitling Navitimer B01 sits at $10,000–$25,000 and the Casio MRW-230H at Under $50. On the specs that outlast any price: the Navitimer B01 uses Cambered Sapphire with 70 Hours, 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: Casio

30m (3 ATM) vs 100m (10 ATM)

The Navitimer B01 is rated to 30m (3 ATM) while the MRW-230H handles 100m (10 ATM). The MRW-230H offers superior water resistance.

Our Verdict

Breitling

Navitimer B01

Choose the Breitling Navitimer B01 if you prioritize In-House Automatic Chronograph Manufacture engineering, Swiss Made craftsmanship, and 30m (3 ATM) water resistance. At $10,000–$25,000, it delivers Automatic Breitling 01 (Manufacture) with 70 Hours 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 Breitling Navitimer B01 and Casio MRW-230H represent two distinct approaches to fine watchmaking — the Breitling bringing Swiss Made tradition while Casio delivers Casio (Japan) engineering.

Frequently Asked Questions

The Breitling Navitimer B01 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 30 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 Breitling Navitimer B01 may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Navitimer B01 at 43mm with 30m (3 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 Navitimer B01 uses Cambered Sapphire 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.