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Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) vs Cartier Tank Américaine small model (18k yellow gold)
Breguet's dress watch meets Cartier's timepiece
Quick Verdict
The Cartier Tank Américaine small model (18k yellow gold) ($5,000–$10,000) delivers Cartier quartz technology in the tier below the Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) ($25,000+). The Tank Américaine small model (18k yellow gold) measures Small model, about 35mm long and is rated 30m (3 ATM) per Cartier for the Américaine. The Classique 7137 Power Reserve Moonphase (18k yellow gold) justifies its premium with Swiss Made heritage and Automatic, Breguet Calibre 502.3 QSE1 (ultra-thin, off-centre rotor). Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) | Cartier Tank Américaine small model (18k yellow gold) |
|---|---|---|
| Price | $25,000+ | $5,000–$10,000 |
| Case Size | 39mm | Small model, about 35mm long |
| Movement | Automatic, Breguet Calibre 502.3 QSE1 (ultra-thin, off-centre rotor) | Quartz (Cartier small model) |
| Caliber Type | Breguet 502.3 QSE1, automatic, silicon escapement | Cartier quartz |
| Power Reserve | About 45 hours, with indicator | Battery |
| Water Resistance | 30m (3 ATM) | 30m (3 ATM) per Cartier for the Américaine |
| Crystal | Sapphire Crystal, sapphire caseback | Sapphire Crystal |
| Case Material | 18k yellow gold, fluted caseband | 18k yellow gold, curved rectangular case |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Breguet's design language vs Cartier'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 Cartier Tank Américaine small model (18k yellow gold) offers 18k yellow gold, curved rectangular case construction at Small model, about 35mm long with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic, Breguet Calibre 502.3 QSE1 (ultra-thin, off-centre rotor) vs Quartz (Cartier small model)
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 Tank Américaine small model (18k yellow gold) uses the Quartz (Cartier small model) (Cartier quartz, Battery reserve) at standard. The Classique 7137 Power Reserve Moonphase (18k yellow gold) edges ahead on power reserve.
Wearability & Fit
39mm vs Small model, about 35mm long — different wrist presence
At 39mm, the Classique 7137 Power Reserve Moonphase (18k yellow gold) has a bolder wrist presence compared to the Tank Américaine small model (18k yellow gold) at Small model, about 35mm long. Water resistance differs: 30m (3 ATM) vs 30m (3 ATM) per Cartier for the Américaine.
Value & Cost of Ownership
Cartier sits in the lower tier
The Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) sits at $25,000+ and the Cartier Tank Américaine small model (18k yellow gold) at $5,000–$10,000. 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 and Battery on the Tank Américaine small model (18k yellow gold). Service intervals are typically 5-7 years for both.
Water Resistance
30m (3 ATM) vs 30m (3 ATM) per Cartier for the Américaine
The Classique 7137 Power Reserve Moonphase (18k yellow gold) is rated to 30m (3 ATM) while the Tank Américaine small model (18k yellow gold) handles 30m (3 ATM) per Cartier for the Américaine. Both offer identical water resistance ratings.
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 AmazonCartier
Tank Américaine small model (18k yellow gold)
Choose the Cartier Tank Américaine small model (18k yellow gold) if you value Cartier quartz technology, Swiss Made heritage, and Small model, about 35mm long proportions. At $5,000–$10,000, the Quartz (Cartier small model) with Battery power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Breguet Classique 7137 Power Reserve Moonphase (18k yellow gold) and Cartier Tank Américaine small model (18k yellow gold) represent two distinct approaches to fine watchmaking — the Breguet bringing Swiss Made tradition while Cartier 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.