{"query": "Duality", "brand": null, "total": 1, "limit": 10, "matches": [{"slug": "philippe-dufour-duality-rose-gold", "brand": "Philippe Dufour", "ref": "Duality", "model": "Duality", "case_material": "18k Rose Gold", "url": "https://mostexpensivewatches.net/reference/philippe-dufour-duality-rose-gold", "description": "The Philippe Dufour Duality was produced between 1996 and approximately 1999, with only nine examples originally completed despite an intended run of 25. This reference is valued for its Caliber 8 movement, which features two independent balance wheels linked by a central differential to average out rate errors. The 18k rose gold case measures 34mm in diameter and houses a minimalist silver dial with a sub-seconds register at 8 o’clock. Collectors prioritize the Duality as the first wristwatch to incorporate a dual-regulator system, a complication previously reserved for pocket watches. Due to its extreme scarcity and historical significance, secondary market prices typically fall within the mid-seven-figure range. A notable auction result occurred in 2017 when a rose gold Duality, numbered 00, sold for nearly $1 million, though current valuations have since escalated significantly during private and public sales.", "score": 202}]}