{"reference": {"slug": "patek-philippe-3940p", "brand": "Patek Philippe", "ref": "3940P", "model": "Perpetual Calendar (Platinum Anniversary)", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-3940p", "description": "The Patek Philippe Reference 3940 was produced from 1985 to approximately 2007, serving as the brand's flagship perpetual calendar for over two decades. Collectors prioritize this reference for its ultra-thin 36mm case and the Caliber 240 Q, a self-winding movement featuring an off-center 22k gold micro-rotor. The platinum 3940P variant is distinguished by its solid case back and a small diamond set between the lugs at 6 o’clock, a hallmark of the metal. The dial layout utilizes three sub-dials to display the day, month, leap year, 24-hour cycle, and moon phase. On the secondary market, the 3940P typically trades between $65,000 and $95,000 depending on the series and provenance. A notable production detail includes the transition from the early \"sunken\" sub-dials of the first series to the flatter registers found in later iterations, which significantly impacts individual valuation."}, "listing_stats": {"count": 7, "median": 52500.0, "low": 27500.0, "high": 65000.0, "brands": 1, "merchants": 3}, "listings": [{"id": "h_7516691431511", "title": "Patek Philippe Patek Philippe Annual Calendar Moonphase", "brand": "Patek Philippe", "model": "Patek Philippe Annual Calendar Moonphase", "reference": "—", "price_usd": 57500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Annual Calendar", "Moon Phase"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": 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Dial | 36mm | 2000s", "reference": "3940", "price_usd": 47500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Yellow Gold", "case_size_mm": 36.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Moon Phase"], "merchant_slug": "watch-collectors-uk", "merchant_name": "Watch Collectors UK", "image_url": "https://cdn.shopify.com/s/files/1/0628/2218/7234/files/PatekPhilippe18KYellowGoldMoonphase_aefbb6b0-dc55-4a76-adbc-871358714065.jpg?v=1773924370", "detail_url": "https://mostexpensivewatches.net/listing/h_15102320738687", "buy_url": "https://mostexpensivewatches.net/out/h_15102320738687", "alt_buy_urls": [{"partner": "goldsmiths", "name": "Goldsmiths", "region": "UK", "url": "https://mostexpensivewatches.net/out/h_15102320738687/via/goldsmiths"}, {"partner": "selfridges", "name": "Selfridges", "region": "UK", "url": "https://mostexpensivewatches.net/out/h_15102320738687/via/selfridges"}, {"partner": "farfetch", 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null, "case_material": "Platinum", "case_size_mm": 36.0, "movement": "Automatic", "complications": [], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/Patek_Philippe_3940_Platinum_Anthracite_A_Collected_Man_London_9_v2.jpg?v=1782994718", "detail_url": "https://mostexpensivewatches.net/listing/h_6592113999955", "buy_url": "https://mostexpensivewatches.net/out/h_6592113999955", "alt_buy_urls": [{"partner": "goldsmiths", "name": "Goldsmiths", "region": "UK", "url": "https://mostexpensivewatches.net/out/h_6592113999955/via/goldsmiths"}, {"partner": "selfridges", "name": "Selfridges", "region": "UK", "url": "https://mostexpensivewatches.net/out/h_6592113999955/via/selfridges"}, {"partner": "farfetch", "name": "Farfetch", "region": "Global", "url": "https://mostexpensivewatches.net/out/h_6592113999955/via/farfetch"}], "available": false}, {"id": "h_7117907066963", "title": "Patek Philippe Perpetual Calendar | 3940 | Second Series | Yellow Gold", "brand": "Patek Philippe", "model": "Perpetual Calendar | 3940 | Second Series | Yellow Gold", "reference": "3940", "price_usd": 48500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Yellow Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/c5406fbe6eb152ff59c451b150afeadb.jpg?v=1702463195", "detail_url": "https://mostexpensivewatches.net/listing/h_7117907066963", "buy_url": "https://mostexpensivewatches.net/out/h_7117907066963", "alt_buy_urls": [{"partner": "goldsmiths", "name": "Goldsmiths", "region": "UK", "url": "https://mostexpensivewatches.net/out/h_7117907066963/via/goldsmiths"}, {"partner": "selfridges", "name": "Selfridges", "region": "UK", "url": "https://mostexpensivewatches.net/out/h_7117907066963/via/selfridges"}, {"partner": "farfetch", "name": "Farfetch", "region": "Global", "url": "https://mostexpensivewatches.net/out/h_7117907066963/via/farfetch"}], "available": false}, {"id": "h_7641633521890", "title": "Patek Philippe Patek Philippe Perpetual Calendar 3940 18K", "brand": "Patek Philippe", "model": "Patek Philippe Perpetual Calendar 3940 18K", "reference": "3940", "price_usd": 27500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Yellow Gold", "case_size_mm": 36.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Moon Phase"], "merchant_slug": "watch-collectors-uk", "merchant_name": "Watch Collectors UK", "image_url": "https://cdn.shopify.com/s/files/1/0628/2218/7234/products/patek_philippe_perpetual_calendar_3940_18k_yellow_gold_second_hand_watch_collectors_1.jpg?v=1647034370", "detail_url": "https://mostexpensivewatches.net/listing/h_7641633521890", "buy_url": "https://mostexpensivewatches.net/out/h_7641633521890", "alt_buy_urls": [{"partner": "goldsmiths", "name": "Goldsmiths", "region": "UK", "url": "https://mostexpensivewatches.net/out/h_7641633521890/via/goldsmiths"}, {"partner": "selfridges", "name": "Selfridges", "region": "UK", "url": "https://mostexpensivewatches.net/out/h_7641633521890/via/selfridges"}, {"partner": "farfetch", "name": "Farfetch", "region": "Global", "url": "https://mostexpensivewatches.net/out/h_7641633521890/via/farfetch"}], "available": false}], "auction_lots": [{"slug": "patek-3940g-platinum-anniversary", "brand": "Patek Philippe", "reference": "3940P", "model": "Perpetual Calendar (Platinum Anniversary)", "case_material": "Platinum", "hammer_usd": 1810000, "year_sold": 2021, "venue": "Phillips Hong Kong", "lot_summary": "Limited platinum 3940 made for Patek's 150th anniversary. Standard 3940 trades in the $80k-$120k range.", "url": "https://mostexpensivewatches.net/auctions/patek-3940g-platinum-anniversary"}]}