{"reference": {"slug": "roger-dubuis-ex42", "brand": "Roger Dubuis", "ref": "EX42", "model": "Excalibur Chronograph", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/roger-dubuis-ex42", "description": "The Roger Dubuis Excalibur Chronograph EX42 in stainless steel was produced during the mid-2000s, representing the era when the manufacture’s founder was still active in the company. Collectors prioritize this reference for its RD78 movement, an in-house, integrated column-wheel chronograph caliber featuring a micro-rotor and the Poinçon de Genève certification. The 42mm case is characterized by a triple-lug design and a notched bezel, while the dial typically features oversized Roman numerals and a bi-compax layout. Production for these early steel models was limited, often restricted to 280 pieces per variation. On the secondary market, these watches generally trade between $8,000 and $12,000 depending on condition and the presence of original documentation. A notable production detail is that these movements were among the first high-complication calibers developed entirely in-house by the brand before its acquisition by the Richemont Group."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "roger-dubuis-ex427793-7ar-2016", "brand": "Roger Dubuis", "reference": "EX427793.7AR", "model": "Excalibur", "case_material": "18k White Gold", "hammer_usd": 77500, "year_sold": 2016, "venue": "Phillips Hong Kong", "lot_summary": "A rare 46.5mm white gold Excalibur, limited to 28 pieces, showcasing the brand's transition into larger, more avant-garde designs.", "source_url": "https://www.phillips.com/detail/roger-dubuis/HK080116/114", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/roger-dubuis-ex427793-7ar-2016"}, {"slug": "roger-dubuis-ex42-78-90-2016", "brand": "Roger Dubuis", "reference": "EX42.78.90", "model": "Excalibur Chronograph", "case_material": "Stainless Steel", "hammer_usd": 10500, "year_sold": 2016, "venue": "Phillips Hong Kong", "lot_summary": "A limited edition stainless steel chronograph from the Excalibur collection, featuring a bold 42mm case and automatic movement.", "source_url": "https://www.phillips.com/detail/roger-dubuis/HK080116/115", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/roger-dubuis-ex42-78-90-2016"}]}