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{"count": 4, "median": 57225.0, "low": 55500.0, "high": 98500.0, "brands": 1, "merchants": 2, "listing_price": 98500.0, "position": "highest", "delta_vs_median_pct": 72.1}, "reference": {"slug": "patek-philippe-5320g-perpetual-calendar-white-gold", "ref": "5320G-001", "brand": "Patek Philippe", "model": "Perpetual Calendar", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5320g-perpetual-calendar-white-gold", "alternatives_url": "https://mostexpensivewatches.net/api/alternatives/patek-philippe-5320g-perpetual-calendar-white-gold"}, "cross_reference_alternatives": [{"reference": {"slug": "patek-philippe-5013r", "brand": "Patek Philippe", "ref": "5013R", "model": "Minute Repeating Perpetual Calendar", "case_material": "18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5013r", "description": "The Patek Philippe Reference 5013R was produced between 1992 and 2010, representing one of the brand's most complex watches prior to the release of the Sky Moon Tourbillon. This reference is distinguished by its tonneau-shaped 18k pink gold case and a movement comprised of 515 parts. It features the self-winding Caliber R 27 PS QR, which integrates a minute repeater, a perpetual calendar with a retrograde date hand, and a moon phase indicator. Collectors value the 5013R for its specific combination of a shaped case and a high-complication automatic movement, a rarity in Patek Philippe’s historical catalog. On the secondary market, this reference typically commands prices between $450,000 and $650,000 depending on provenance and condition. A notable production detail is that while most examples feature a silvered dial, a limited number were produced with black dials, which often realize higher premiums at international auction houses."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/review/patek-philippe-5013r", "alternatives_url": "https://mostexpensivewatches.net/alternatives/patek-philippe-5013r"}, {"reference": {"slug": "patek-philippe-5740-1g-nautilus-perpetual-calendar", "brand": "Patek Philippe", "ref": "5740/1G-001", "model": "Nautilus Perpetual Calendar", "case_material": "18k White Gold", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5740-1g-nautilus-perpetual-calendar", "description": "The Patek Philippe Nautilus Perpetual Calendar 5740/1G-001 was introduced in 2018 as the first grand complication in the Nautilus collection and remains in current production. It features a 40mm case and integrated bracelet crafted from 18k white gold, housing the ultra-thin self-winding caliber 240 Q. This movement allows the case to maintain a profile of 8.42mm, making it the thinnest perpetual calendar in the brand's catalog. The dial is finished in blue sunburst with horizontal embossing and features three sub-dials indicating the day, date, month, leap year, 24-hour cycle, and moon phases. On the secondary market, this reference typically commands prices in the mid-to-high six-figure range, often fluctuating between $210,000 and $260,000 depending on condition and provenance. A notable production detail is the inclusion of the fold-over clasp with four independent catches for improved security compared to earlier Nautilus iterations."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 1, "median": 260000.0, "low": 260000.0, "high": 260000.0, "brands": 1, "merchants": 1}, "top_listing": {"id": "h_6861942915281", "title": "Patek Philippe Patek Philippe Nautilus 5740/1G-001", "brand": "Patek Philippe", "model": "Patek Philippe Nautilus 5740/1G-001", "reference": "5740/1G-001", "price_usd": 260000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k White Gold", "case_size_mm": 40.5, "movement": "Automatic", "complications": [], "merchant_slug": "material-good", "merchant_name": "Material Good", "image_url": "https://cdn.shopify.com/s/files/1/0561/5190/0369/files/Patek_Philippe_Nautilus_5740_1G-001.jpg?v=1777673815", "detail_url": "https://mostexpensivewatches.net/listing/h_6861942915281", "buy_url": "https://mostexpensivewatches.net/out/h_6861942915281", "available": true}, "auction_comp_count": 0, "review_url": "https://mostexpensivewatches.net/review/patek-philippe-5740-1g-nautilus-perpetual-calendar", "alternatives_url": "https://mostexpensivewatches.net/alternatives/patek-philippe-5740-1g-nautilus-perpetual-calendar"}, {"reference": {"slug": "patek-philippe-3448", "brand": "Patek Philippe", "ref": "3448", "model": "Perpetual Calendar", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-3448", "description": "Produced between 1962 and approximately 1981, the Patek Philippe Reference 3448 was the manufacture’s first automatic perpetual calendar wristwatch. Collectors prioritize this reference for its Caliber 27-460 Q movement and its 37.5mm \"Padellone\" case, characterized by sharp, angular lugs and a minimalist dial layout featuring day and month apertures at twelve o'clock. Approximately 586 total examples were made, with the vast majority cased in 18k yellow gold. Secondary market prices for yellow gold specimens typically range from $300,000 to over $500,000 depending on condition and dial series. Four distinct dial variations exist, distinguished by the typography and the presence of a leap year indicator on later versions. A notable production rarity is the \"Senza Luna\" variant, which lacks a moon phase complication; one such example achieved a hammer price exceeding $1.1 million at a 2017 Christie’s auction."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 61, "median": 67770.0, "low": 33000.0, "high": 340000.0, "brands": 1, "merchants": 5}, "top_listing": {"id": "h_7477190918231", "title": "Patek Philippe Patek Philippe Perpetual Calendar", "brand": "Patek Philippe", "model": "Patek Philippe Perpetual Calendar", "reference": "40930788", "price_usd": 89950.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS11185_40930788_PATEKPHILIPPE_PERPETUALCALENDAR_3945-1J-6.jpg?v=1759332472", "detail_url": "https://mostexpensivewatches.net/listing/h_7477190918231", "buy_url": "https://mostexpensivewatches.net/out/h_7477190918231", "available": true}, "auction_comp_count": 3, "review_url": "https://mostexpensivewatches.net/review/patek-philippe-3448", "alternatives_url": "https://mostexpensivewatches.net/alternatives/patek-philippe-3448"}, {"reference": {"slug": "patek-philippe-2497", "brand": "Patek Philippe", "ref": "2497", "model": "Perpetual Calendar (Mid-century)", "case_material": "18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-2497", "description": "The Patek Philippe Reference 2497 was produced between 1951 and 1963, serving as the brand's first series-produced perpetual calendar wristwatch with a center seconds hand. It utilizes the manual-wind Caliber 27-SC Q movement housed in a 37mm case, which was considered oversized for the era. Collectors prioritize this reference for its technical transition from the 1526 and its shared aesthetic DNA with the 2499 chronograph. The 18k pink gold variant is significantly rarer than the yellow gold version, with fewer than 40 examples identified in this metal. Key design evolutions include the shift from \"Feuille\" hands and applied Arabic numerals in the first series to \"Dauphine\" hands and baton markers in the second series. Current secondary market values for pink gold examples typically range from $400,000 to over $700,000, depending on provenance and case crispness, as evidenced by high-profile results at major Geneva auctions."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/review/patek-philippe-2497", "alternatives_url": "https://mostexpensivewatches.net/alternatives/patek-philippe-2497"}, {"reference": {"slug": "patek-philippe-3450", "brand": "Patek Philippe", "ref": "3450", "model": "Perpetual Calendar Automatic (with Leap Year)", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-3450", "description": "The Patek Philippe Reference 3450 was produced between 1981 and 1985 as the successor to the Reference 3448. Approximately 244 examples were manufactured, nearly all in 18k yellow gold. It is the first Patek Philippe perpetual calendar wristwatch to feature a leap year indicator on the dial, located at 4 o'clock. The watch utilizes the caliber 27-460 QB automatic movement housed in a 37.5mm case with sharp, angular lugs and a snap-on back. Collectors categorize the reference into two series: the first features a red leap year indicator, while the second uses Roman numerals I, II, III, and IIII. On the secondary market, prices typically range from $250,000 to over $600,000 depending on condition and series. A rare white gold variant exists, with only two examples publicly known, one of which achieved a sale price exceeding $1.5 million at auction."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/review/patek-philippe-3450", "alternatives_url": "https://mostexpensivewatches.net/alternatives/patek-philippe-3450"}, {"reference": {"slug": "patek-philippe-5270", "brand": "Patek Philippe", "ref": "5270", "model": "Perpetual Calendar Chronograph", "case_material": "18k White Gold", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5270", "description": "The Patek Philippe Reference 5270 in 18k white gold was introduced in 2011 as the successor to the 5970, marking the first perpetual calendar chronograph from the manufacture to utilize a fully in-house movement, the Caliber CH 29-535 PS Q. The white gold model has seen three distinct series: the first series (5270G-001) lacked a tachymeter scale, the second series introduced the \"chin\" at six o'clock, and the third series (5270G-018 and 019) returned to a cleaner dial layout with a tachymeter scale. While the white gold versions are now discontinued in favor of platinum and yellow gold, they remain significant for transitioning the brand away from Lemania-based calibers. On the secondary market, these timepieces typically trade in the low-to-mid six-figure range, generally between $130,000 and $165,000 depending on the series and set completeness. The first series remains particularly notable for its short production run of approximately two years."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 11, "median": 155000.0, "low": 120000.0, "high": 340000.0, "brands": 1, "merchants": 5}, "top_listing": {"id": "h_7690293248209", "title": "Patek Philippe Patek Philippe Grand Complications 5270P-014", "brand": "Patek Philippe", "model": "Patek Philippe Grand Complications 5270P-014", "reference": "5270P-014", "price_usd": 195000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 41.0, "movement": "Automatic", "complications": [], "merchant_slug": "material-good", "merchant_name": "Material Good", "image_url": "https://cdn.shopify.com/s/files/1/0561/5190/0369/files/IMG_1955.jpg?v=1767993624", "detail_url": "https://mostexpensivewatches.net/listing/h_7690293248209", "buy_url": "https://mostexpensivewatches.net/out/h_7690293248209", "available": true}, "auction_comp_count": 0, "review_url": "https://mostexpensivewatches.net/review/patek-philippe-5270", "alternatives_url": "https://mostexpensivewatches.net/alternatives/patek-philippe-5270"}]}