{"reference": {"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."}, "listing_stats": {"count": 1, "median": 1415000.0, "low": 1415000.0, "high": 1415000.0, "brands": 1, "merchants": 1}, "listings": [{"id": "h_7439880290387", "title": "Philippe Dufour Duality | Platinum", "brand": "Philippe Dufour", "model": "Duality | Platinum", "reference": "CMAPT_P1999", "price_usd": 1415000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 34.0, "movement": "Automatic", "complications": [], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/Philippe_Dufour_Duality__platinum_A_Collected_Man_London_Thumbnail_00.jpg?v=1725979178", "detail_url": "https://mostexpensivewatches.net/listing/h_7439880290387", "buy_url": "https://mostexpensivewatches.net/out/h_7439880290387", "available": false}], "auction_lots": [{"slug": "philippe-dufour-duality-platinum", "brand": "Philippe Dufour", "reference": "Duality", "model": "Duality", "case_material": "Platinum", "hammer_usd": 1800000, "year_sold": 2017, "venue": "Phillips New York", "lot_summary": "The first wristwatch to feature a dual escapement with a differential system. Only nine examples were ever produced, as the complexity of regulating two balances proved too time-consuming even for Dufour.", "url": "https://mostexpensivewatches.net/auctions/philippe-dufour-duality-platinum"}, {"slug": "philippe-dufour-duality-2021", "brand": "Philippe Dufour", "reference": "Duality", "model": "Duality No. 08", "case_material": "18k Pink Gold", "hammer_usd": 3993792, "year_sold": 2021, "venue": "Phillips Geneva", "lot_summary": "One of only nine examples ever produced, this piece features a double escapement with two independent balance wheels linked by a differential.", "source_url": "https://www.phillips.com/detail/philippe-dufour/CH080221/13", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/philippe-dufour-duality-2021"}, {"slug": "philippe-dufour-duality-2024", "brand": "Philippe Dufour", "reference": "Duality", "model": "Duality No. 03", "case_material": "18k White Gold", "hammer_usd": 2056500, "year_sold": 2024, "venue": "Phillips New York", "lot_summary": "The only known example of the Duality to be delivered with two distinct dial and hand sets, including a lacquered Roman numeral dial.", "source_url": "https://www.phillips.com/detail/philippe-dufour/NY080124/87", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/philippe-dufour-duality-2024"}]}