{"reference": {"slug": "patek-philippe-1518", "brand": "Patek Philippe", "ref": "1518", "model": "Perpetual Calendar Chronograph (1941)", "case_material": "18k Pink Gold", "url": "https://mostexpensivewatches.net/reference/patek-philippe-1518"}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "patek-1518-steel-1943", "brand": "Patek Philippe", "reference": "1518", "model": "Perpetual Calendar Chronograph", "case_material": "Stainless Steel", "hammer_usd": 11136642, "year_sold": 2016, "venue": "Phillips Geneva", "lot_summary": "Perpetual calendar chronograph in stainless steel. Only 4 known examples (the rest in gold). Held auction record for a wristwatch from 2016 until Patek 6300A in 2019.", "url": "https://mostexpensivewatches.net/auctions/patek-1518-steel-1943"}, {"slug": "patek-1518-pink-gold", "brand": "Patek Philippe", "reference": "1518", "model": "Perpetual Calendar Chronograph (Pink Gold)", "case_material": "18k Pink Gold", "hammer_usd": 3171000, "year_sold": 2021, "venue": "Phillips Geneva", "lot_summary": "Pink gold 1518 — fewer than 60 produced in pink gold (out of 281 total 1518 production). Cleanest period perpetual chronograph.", "url": "https://mostexpensivewatches.net/auctions/patek-1518-pink-gold"}]}