{"reference": {"slug": "patek-philippe-2499", "brand": "Patek Philippe", "ref": "2499", "model": "Perpetual Calendar Chronograph (vintage)", "case_material": "18k Yellow Gold", "url": "https://mostexpensivewatches.net/reference/patek-philippe-2499"}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "patek-2499-first-series-yellow-gold", "brand": "Patek Philippe", "reference": "2499", "model": "Perpetual Calendar Chronograph (First Series)", "case_material": "18k Yellow Gold", "hammer_usd": 5661730, "year_sold": 2018, "venue": "Phillips Geneva", "lot_summary": "Early-1950s 'first series' 2499. Square pushers, applied Arabic numerals at 12. One of the most coveted modern Patek references.", "url": "https://mostexpensivewatches.net/auctions/patek-2499-first-series-yellow-gold"}]}