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Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) vs Omega Constellation Co-Axial 38mm (18k red gold)
Breguet's dress watch meets Omega's timepiece
Quick Verdict
The Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) ($25,000+) and Omega Constellation Co-Axial 38mm (18k red gold) ($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 Constellation Co-Axial 38mm (18k red gold) focuses on Swiss Made craftsmanship.
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Specifications Compared
| Feature | Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) | Omega Constellation Co-Axial 38mm (18k red gold) |
|---|---|---|
| Price | $25,000+ | $25,000+ |
| Case Size | 39mm | 38mm |
| Movement | Automatic, Breguet Calibre 502.3 QSE1 (ultra-thin, off-centre rotor) | Automatic, Omega Co-Axial Calibre 8501 |
| Caliber Type | Breguet 502.3 QSE1, automatic, silicon escapement | Omega 8501, Co-Axial escapement, silicon balance spring, chronometer-certified |
| Power Reserve | About 45 hours, with indicator | 60 hours |
| Water Resistance | 30m (3 ATM) | 100m (10 ATM) |
| Crystal | Sapphire Crystal, sapphire caseback | Sapphire Crystal, sapphire exhibition caseback |
| Case Material | 18k yellow gold, fluted caseband | 18k red gold |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Breguet's design language vs Omega'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 Omega Constellation Co-Axial 38mm (18k red gold) offers 18k red gold construction at 38mm with Sapphire Crystal, sapphire exhibition 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 Automatic, Omega Co-Axial Calibre 8501
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 Constellation Co-Axial 38mm (18k red gold) uses the Automatic, Omega Co-Axial Calibre 8501 (Omega 8501, Co-Axial escapement, silicon balance spring, chronometer-certified, 60 hours reserve) at standard. The Constellation Co-Axial 38mm (18k red gold) offers a longer power reserve.
Wearability & Fit
39mm vs 38mm — different wrist presence
At 39mm, the Classique 7137 Power Reserve Moonphase (18k yellow gold) has a bolder wrist presence compared to the Constellation Co-Axial 38mm (18k red gold) at 38mm. 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 Omega Constellation Co-Axial 38mm (18k red gold) 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 exhibition caseback and 60 hours on the Constellation Co-Axial 38mm (18k red gold). 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 Constellation Co-Axial 38mm (18k red gold) handles 100m (10 ATM). The Constellation Co-Axial 38mm (18k red gold) 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 AmazonOmega
Constellation Co-Axial 38mm (18k red gold)
Choose the Omega Constellation Co-Axial 38mm (18k red gold) if you value Omega 8501, Co-Axial escapement, silicon balance spring, chronometer-certified technology, Swiss Made heritage, and 38mm proportions. At $25,000+, the Automatic, Omega Co-Axial Calibre 8501 with 60 hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) and Omega Constellation Co-Axial 38mm (18k red gold) represent two distinct approaches to fine watchmaking — the Breguet bringing Swiss Made tradition while Omega 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.