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Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) vs Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue)
Breguet's dress watch meets Ulysse Nardin's timepiece
Quick Verdict
The Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) ($25,000+) and Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) ($25,000+) are closely matched timepieces at similar price points. The Classique 7137 Power Reserve Moonphase (18k yellow gold) emphasizes Breguet 502.3 QSE1, automatic, silicon escapement engineering while the Executive Skeleton X 42mm (18k rose gold, blue) focuses on Swiss Made craftsmanship.
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Specifications Compared
| Feature | Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) | Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) |
|---|---|---|
| Price | $25,000+ | $25,000+ |
| Case Size | 39mm | 42mm |
| Movement | Automatic, Breguet Calibre 502.3 QSE1 (ultra-thin, off-centre rotor) | Hand-wound, Ulysse Nardin UN-371 (skeleton) |
| Caliber Type | Breguet 502.3 QSE1, automatic, silicon escapement | UN-371, hand-wound, silicon escapement and balance spring |
| Power Reserve | About 45 hours, with indicator | About 96 hours (four days) |
| Water Resistance | 30m (3 ATM) | 100m (10 ATM) |
| Crystal | Sapphire Crystal, sapphire caseback | Sapphire Crystal, sapphire caseback |
| Case Material | 18k yellow gold, fluted caseband | 18k rose gold, blue bezel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Breguet's design language vs Ulysse Nardin's approach
The Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) features a 18k yellow gold, fluted caseband case at 39mm with Sapphire Crystal, sapphire caseback 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
Automatic, Breguet Calibre 502.3 QSE1 (ultra-thin, off-centre rotor) vs Hand-wound, Ulysse Nardin UN-371 (skeleton)
The Classique 7137 Power Reserve Moonphase (18k yellow gold) runs the Automatic, Breguet Calibre 502.3 QSE1 (ultra-thin, off-centre rotor) (Breguet 502.3 QSE1, automatic, silicon escapement, About 45 hours, with indicator 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
39mm vs 42mm — different wrist presence
At 39mm, the Classique 7137 Power Reserve Moonphase (18k yellow gold) wears more compactly on smaller wrists compared to the Executive Skeleton X 42mm (18k rose gold, blue) at 42mm. Water resistance differs: 30m (3 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Same tier — different value propositions
The Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) sits at $25,000+ and the Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) at $25,000+. On the specs that outlast any price: the Classique 7137 Power Reserve Moonphase (18k yellow gold) uses Sapphire Crystal, sapphire caseback with About 45 hours, with indicator, 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
30m (3 ATM) vs 100m (10 ATM)
The Classique 7137 Power Reserve Moonphase (18k yellow gold) is rated to 30m (3 ATM) while the Executive Skeleton X 42mm (18k rose gold, blue) handles 100m (10 ATM). The Executive Skeleton X 42mm (18k rose gold, blue) offers superior water resistance.
Our Verdict
Breguet
Classique 7137 Power Reserve Moonphase (18k yellow gold)
Choose the Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) if you prioritize Breguet 502.3 QSE1, automatic, silicon escapement engineering, Swiss Made craftsmanship, and 30m (3 ATM) water resistance. At $25,000+, it delivers Automatic, Breguet Calibre 502.3 QSE1 (ultra-thin, off-centre rotor) with About 45 hours, with indicator 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 Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) and Ulysse Nardin Executive Skeleton X 42mm (18k rose gold, blue) represent two distinct approaches to fine watchmaking — the Breguet bringing Swiss Made 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.