{"reference": {"slug": "vacheron-constantin-80172", "brand": "Vacheron Constantin", "ref": "80172", "model": "Traditionnelle Minute Repeater Perpetual Calendar", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/vacheron-constantin-80172", "description": "The Vacheron Constantin Traditionnelle Minute Repeater Perpetual Calendar reference 80172/000P-9589 was introduced around 2011 and is no longer in regular production. Collectors prioritize this reference for the Calibre 2755, a manual-wind movement comprising 602 components that integrates a minute repeater, a perpetual calendar, and a tourbillon with a characteristic Maltese cross carriage. The 44mm platinum case features a silvered opaline dial with a power reserve indicator located on the reverse side to maintain dial symmetry. This reference represents a high-complication peak for the brand’s contemporary lineup, utilizing a centripetal governor for the repeater to ensure silent operation. On the secondary market, this model typically commands prices in the mid-to-high six-figure range, often between $350,000 and $500,000 depending on provenance. A notable 2019 auction result at Christie’s saw a platinum example achieve approximately $375,000, confirming its status as a significant investment-grade piece."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "vacheron-constantin-80172-2021", "brand": "Vacheron Constantin", "reference": "80172", "model": "Traditionnelle Minute Repeater Perpetual Calendar", "case_material": "Platinum", "hammer_usd": 310586, "year_sold": 2021, "venue": "Bonhams London", "lot_summary": "An exceptionally fine platinum manual wind minute repeating perpetual calendar wristwatch with tourbillon.", "source_url": "https://www.bonhams.com/stories/31934/", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/vacheron-constantin-80172-2021"}]}