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Orient Sun & Moon vs Ulysse Nardin Executive Skeleton Tourbillon 45mm (titanium)
Orient's dress watch meets Ulysse Nardin's timepiece
Quick Verdict
The Orient Sun & Moon ($250–$500) offers Orient In-House Automatic (Hacking, Hand-Winding) precision in the tier below the Ulysse Nardin Executive Skeleton Tourbillon 45mm (titanium) ($25,000+). The Sun & Moon measures 41.5mm and is rated 50m (5 ATM). The Executive Skeleton Tourbillon 45mm (titanium) counters with Swiss Made craftsmanship and 30m (3 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Orient Sun & Moon | Ulysse Nardin Executive Skeleton Tourbillon 45mm (titanium) |
|---|---|---|
| Price | $250–$500 | $25,000+ |
| Case Size | 41.5mm | 45mm |
| Movement | Automatic Caliber F6B24 | Hand-wound, Ulysse Nardin UN-171 flying tourbillon |
| Caliber Type | Orient In-House Automatic (Hacking, Hand-Winding) | UN-171, hand-wound, silicon escapement |
| Power Reserve | 40 Hours | About 170 hours (seven days) |
| Water Resistance | 50m (5 ATM) | 30m (3 ATM) |
| Crystal | Mineral Glass | Sapphire Crystal, sapphire caseback |
| Case Material | Stainless Steel | Titanium, black ceramic bezel |
| Origin | Made in Japan | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Orient's design language vs Ulysse Nardin's approach
The Orient Sun & Moon features a Stainless Steel case at 41.5mm with Mineral Glass protection. The Ulysse Nardin Executive Skeleton Tourbillon 45mm (titanium) offers Titanium, black ceramic bezel construction at 45mm with Sapphire Crystal, sapphire caseback. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Caliber F6B24 vs Hand-wound, Ulysse Nardin UN-171 flying tourbillon
The Sun & Moon runs the Automatic Caliber F6B24 (Orient In-House Automatic (Hacking, Hand-Winding), 40 Hours power reserve) at 21,600 vph (3 Hz) frequency. The Executive Skeleton Tourbillon 45mm (titanium) uses the Hand-wound, Ulysse Nardin UN-171 flying tourbillon (UN-171, hand-wound, silicon escapement, About 170 hours (seven days) reserve) at standard. The Executive Skeleton Tourbillon 45mm (titanium) offers a longer power reserve.
Wearability & Fit
41.5mm vs 45mm — different wrist presence
At 41.5mm, the Sun & Moon wears more compactly on smaller wrists compared to the Executive Skeleton Tourbillon 45mm (titanium) at 45mm. Water resistance differs: 50m (5 ATM) vs 30m (3 ATM).
Value & Cost of Ownership
Orient sits in the lower tier
The Orient Sun & Moon sits at $250–$500 and the Ulysse Nardin Executive Skeleton Tourbillon 45mm (titanium) at $25,000+. On the specs that outlast any price: the Sun & Moon uses Mineral Glass with 40 Hours, against Sapphire Crystal, sapphire caseback and About 170 hours (seven days) on the Executive Skeleton Tourbillon 45mm (titanium). Service intervals are typically 5-7 years for both.
Water Resistance
50m (5 ATM) vs 30m (3 ATM)
The Sun & Moon is rated to 50m (5 ATM) while the Executive Skeleton Tourbillon 45mm (titanium) handles 30m (3 ATM). The Sun & Moon is better suited for water activities.
Our Verdict
Orient
Sun & Moon
Choose the Orient Sun & Moon if you prioritize Orient In-House Automatic (Hacking, Hand-Winding) engineering, Made in Japan craftsmanship, and 50m (5 ATM) water resistance. At $250–$500, it delivers Automatic Caliber F6B24 with 40 Hours power reserve.
View the dossierUlysse Nardin
Executive Skeleton Tourbillon 45mm (titanium)
Choose the Ulysse Nardin Executive Skeleton Tourbillon 45mm (titanium) if you value UN-171, hand-wound, silicon escapement technology, Swiss Made heritage, and 45mm proportions. At $25,000+, the Hand-wound, Ulysse Nardin UN-171 flying tourbillon with About 170 hours (seven days) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Orient Sun & Moon and Ulysse Nardin Executive Skeleton Tourbillon 45mm (titanium) represent two distinct approaches to fine watchmaking — the Orient bringing Made in 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.