Updated
Casio MRW-230H vs Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue)
Two timepieces compared — Under $50 vs $25,000+
Quick Verdict
The Casio MRW-230H (Under $50) offers Casio Quartz (Battery) precision in the tier below the Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) ($25,000+). The MRW-230H measures 44.6mm (47.9 x 44.6 x 12.3mm) and is rated 100m (10 ATM). The Executive Skeleton X 42mm (18k rose gold, blue) counters with Swiss Made craftsmanship and 100m (10 ATM) water resistance. Both are exceptional timepieces for their respective tiers.
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Specifications Compared
| Feature | Casio MRW-230H | Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) |
|---|---|---|
| Price | Under $50 | $25,000+ |
| Case Size | 44.6mm (47.9 x 44.6 x 12.3mm) | 42mm |
| Movement | Quartz | Hand-wound, Ulysse Nardin UN-371 (skeleton) |
| Caliber Type | Casio Quartz (Battery) | UN-371, hand-wound, silicon escapement and balance spring |
| Power Reserve | Approx. 3-year battery (SR626SW) | About 96 hours (four days) |
| Water Resistance | 100m (10 ATM) | 100m (10 ATM) |
| Crystal | Resin Glass | Sapphire Crystal, sapphire caseback |
| Case Material | Resin case, aluminum bezel ring | 18k rose gold, blue bezel |
| Origin | Casio (Japan) | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Ulysse Nardin'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 Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) offers 18k rose gold, blue bezel construction at 42mm with Sapphire Crystal, sapphire caseback. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Quartz vs Hand-wound, Ulysse Nardin UN-371 (skeleton)
The MRW-230H runs the Quartz (Casio Quartz (Battery), Approx. 3-year battery (SR626SW) power reserve) at standard frequency. The Executive Skeleton X 42mm (18k rose gold, blue) uses the Hand-wound, Ulysse Nardin UN-371 (skeleton) (UN-371, hand-wound, silicon escapement and balance spring, About 96 hours (four days) reserve) at standard. The Executive Skeleton X 42mm (18k rose gold, blue) offers a longer power reserve.
Wearability & Fit
44.6mm (47.9 x 44.6 x 12.3mm) vs 42mm — 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 Executive Skeleton X 42mm (18k rose gold, blue) at 42mm. Water resistance differs: 100m (10 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio MRW-230H sits at Under $50 and the Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) at $25,000+. On the specs that outlast any price: the MRW-230H uses Resin Glass with Approx. 3-year battery (SR626SW), against Sapphire Crystal, sapphire caseback and About 96 hours (four days) on the Executive Skeleton X 42mm (18k rose gold, blue). Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 100m (10 ATM)
The MRW-230H is rated to 100m (10 ATM) while the Executive Skeleton X 42mm (18k rose gold, blue) handles 100m (10 ATM). Both offer identical water resistance ratings.
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.
Check Price on AmazonUlysse Nardin
Executive Skeleton X 42mm (18k rose gold, blue)
Choose the Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) if you value UN-371, hand-wound, silicon escapement and balance spring technology, Swiss Made heritage, and 42mm proportions. At $25,000+, the Hand-wound, Ulysse Nardin UN-371 (skeleton) with About 96 hours (four days) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio MRW-230H and Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) represent two distinct approaches to the timepiece category — the Casio bringing Casio (Japan) tradition while Ulysse Nardin delivers Swiss Made 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.