Updated
Breguet Marine Dual Time 5857 (18k rose gold, rubber) vs Casio MRW-230H
Two timepieces compared — $25,000+ vs Under $50
Quick Verdict
The Casio MRW-230H (Under $50) delivers Casio Quartz (Battery) technology in the tier below the Breguet Marine Dual Time 5857 (18k rose gold, rubber) ($25,000+). The MRW-230H measures 44.6mm (47.9 x 44.6 x 12.3mm) and is rated 100m (10 ATM). The Marine Dual Time 5857 (18k rose gold, rubber) justifies its premium with Swiss Made heritage and Automatic, Breguet Calibre 517F. Both represent excellent choices in the timepiece category.
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Specifications Compared
| Feature | Breguet Marine Dual Time 5857 (18k rose gold, rubber) | Casio MRW-230H |
|---|---|---|
| Price | $25,000+ | Under $50 |
| Case Size | 42mm | 44.6mm (47.9 x 44.6 x 12.3mm) |
| Movement | Automatic, Breguet Calibre 517F | Quartz |
| Caliber Type | Breguet 517F, automatic dual time | Casio Quartz (Battery) |
| Power Reserve | Per Breguet's published figure for calibre 517F | Approx. 3-year battery (SR626SW) |
| Water Resistance | 100m (10 ATM) | 100m (10 ATM) |
| Crystal | Sapphire Crystal, sapphire caseback | Resin Glass |
| Case Material | 18k rose gold, fluted caseband, screwed lugs | Resin case, aluminum bezel ring |
| Origin | Swiss Made | Casio (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Breguet's design language vs Casio's approach
The Breguet Marine Dual Time 5857 (18k rose gold, rubber) features a 18k rose gold, fluted caseband, screwed lugs case at 42mm with Sapphire Crystal, sapphire caseback 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
Automatic, Breguet Calibre 517F vs Quartz
The Marine Dual Time 5857 (18k rose gold, rubber) runs the Automatic, Breguet Calibre 517F (Breguet 517F, automatic dual time, Per Breguet's published figure for calibre 517F 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.
Wearability & Fit
42mm vs 44.6mm (47.9 x 44.6 x 12.3mm) — different wrist presence
At 42mm, the Marine Dual Time 5857 (18k rose gold, rubber) 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: 100m (10 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Breguet Marine Dual Time 5857 (18k rose gold, rubber) sits at $25,000+ and the Casio MRW-230H at Under $50. On the specs that outlast any price: the Marine Dual Time 5857 (18k rose gold, rubber) uses Sapphire Crystal, sapphire caseback with Per Breguet's published figure for calibre 517F, against Resin Glass and Approx. 3-year battery (SR626SW) on the MRW-230H. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 100m (10 ATM)
The Marine Dual Time 5857 (18k rose gold, rubber) is rated to 100m (10 ATM) while the MRW-230H handles 100m (10 ATM). Both offer identical water resistance ratings.
Our Verdict
Breguet
Marine Dual Time 5857 (18k rose gold, rubber)
Choose the Breguet Marine Dual Time 5857 (18k rose gold, rubber) if you prioritize Breguet 517F, automatic dual time engineering, Swiss Made craftsmanship, and 100m (10 ATM) water resistance. At $25,000+, it delivers Automatic, Breguet Calibre 517F with Per Breguet's published figure for calibre 517F power reserve.
Check Price on AmazonCasio
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.
Check Price on AmazonThe Bottom Line
The Breguet Marine Dual Time 5857 (18k rose gold, rubber) and Casio MRW-230H represent two distinct approaches to the timepiece category — the Breguet bringing Swiss Made tradition while Casio delivers Casio (Japan) engineering.
Frequently Asked Questions
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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.