{"reference": {"slug": "patek-philippe-5951p-001", "brand": "Patek Philippe", "ref": "5951P-001", "model": "Perpetual Calendar Split-Seconds Chronograph", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5951p-001", "description": "The Patek Philippe 5951P-001 was introduced in 2010 and remained in production until approximately 2015. This reference is distinguished by its cushion-shaped platinum case and the caliber CHR 27-525 PS Q, which remains the thinnest column-wheel split-seconds chronograph movement with a perpetual calendar ever produced by the manufacture. Collectors prioritize this model for its technical density, as the movement measures only 7.3mm in height despite its 400 components. The dial features a black lacquer finish with red accents and white gold Breguet numerals, a departure from the brand’s traditional aesthetic. On the secondary market, the 5951P-001 typically commands prices in the mid-to-high six-figure range, often between $350,000 and $500,000 depending on provenance. A notable production detail is the single Top Wesselton diamond set into the case at 6 o'clock, signifying its platinum construction. Low production numbers make this reference a rare find at auction."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "patek-philippe-5951p-001-2023", "brand": "Patek Philippe", "reference": "5951P-001", "model": "Perpetual Calendar Split-Seconds Chronograph", "case_material": "Platinum", "hammer_usd": 355000, "year_sold": 2023, "venue": "Bonhams London", "lot_summary": "An exceptionally rare platinum cushion-form grand complication featuring the ultra-thin caliber CHR 27-525 PS Q, which was the thinnest column-wheel split-seconds chronograph movement at its launch.", "source_url": "https://www.bonhams.com/auctions/28011/lot/100/", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/patek-philippe-5951p-001-2023"}]}