{"reference": {"slug": "patek-philippe-3974", "brand": "Patek Philippe", "ref": "3974", "model": "Minute Repeater Perpetual Calendar", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-3974", "description": "Patek Philippe produced the Reference 3974 between 1989 and approximately 2000 to commemorate the brand’s 150th anniversary. Collectors prioritize this reference because it was the first automatic minute repeater with a perpetual calendar, powered by the 467-part Caliber R 27 Q. The platinum variant is particularly rare, as the majority of the estimated 120 total units were cased in yellow gold. Early examples feature cases hand-forged by Jean-Pierre Hagmann, identified by his hallmark on the lug. The dial displays the day, month, leap year, 24-hour cycle, and moon phase. On the secondary market, platinum 3974 models typically command prices between $1,200,000 and $2,000,000 depending on provenance and condition. A notable auction result occurred at Christie’s in 2022, where a platinum specimen with a black dial and Breguet numerals sold for over $2.5 million, reflecting the premium placed on rare dial configurations."}, "lang": "pt", "url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-3974", "reference_url": "https://mostexpensivewatches.net/pt/reference/patek-philippe-3974", "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-3974", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "auction_comp_count": 3, "alternatives": [{"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."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek; similar platinum case profile.", "listing_stats": {"count": 3, "median": 52500.0, "low": 48500.0, "high": 65000.0, "brands": 1, "merchants": 1}, "top_listing": {"id": "h_6786358476883", "title": "Patek Philippe 3940P | Platinum", "brand": "Patek Philippe", "model": "3940P | Platinum", "reference": "3940P", "price_usd": 65000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "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/products/Patek_Philippe_3940P_Platinum_A_Collected_Man_London_CANPT_P1570_09.jpg?v=1655456198", "detail_url": "https://mostexpensivewatches.net/listing/h_6786358476883", "buy_url": "https://mostexpensivewatches.net/out/h_6786358476883", "available": false}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-3940p", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-3940p"}, {"reference": {"slug": "patek-philippe-5970", "brand": "Patek Philippe", "ref": "5970", "model": "Perpetual Calendar Chronograph", "case_material": "Platinum", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5970", "description": "The Patek Philippe Reference 5970 was produced between 2004 and 2011, serving as the final perpetual calendar chronograph from the brand to utilize a Lemania-based movement. The 5970P platinum variant was manufactured specifically between 2009 and 2011, marking the end of the reference's production cycle. Collectors prioritize this model for its 40mm case diameter, which bridges the gap between vintage and modern proportions, and the Caliber CH 27-70 Q movement. The platinum version is distinguished by its solid black dial and a single Top Wesselton diamond set between the lugs at 6 o’clock. On the secondary market, the 5970P typically commands prices in the mid-to-high six-figure range, often between $350,000 and $450,000 depending on provenance. A notable production detail is that the 5970P was produced in significantly lower quantities than the yellow, rose, or white gold iterations."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek; similar platinum case profile.", "listing_stats": {"count": 9, "median": 155000.0, "low": 120000.0, "high": 340000.0, "brands": 1, "merchants": 3}, "top_listing": {"id": "h_15262733730169", "title": "Patek Philippe Perpetual Calendar Chronograph | 3970E | Platinum", "brand": "Patek Philippe", "model": "Perpetual Calendar Chronograph | 3970E | Platinum", "reference": "3970E", "price_usd": 340000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Chronograph"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/Patek_Philippe_Perpetual_Calendar_Chronograph_3970E_platinum_A_Collected_Man_London_Thumbnail_00.jpg?v=1764768413", "detail_url": "https://mostexpensivewatches.net/listing/h_15262733730169", "buy_url": "https://mostexpensivewatches.net/out/h_15262733730169", "available": false}, "auction_comp_count": 0, "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-5970", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-5970"}, {"reference": {"slug": "patek-philippe-5970p-perpetual-calendar-chrono-platinum", "brand": "Patek Philippe", "ref": "5970P-001", "model": "Perpetual Calendar Chronograph", "case_material": "Platinum", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5970p-perpetual-calendar-chrono-platinum", "description": "The Patek Philippe 5970P-001 was produced between 2009 and 2010, serving as the final iteration of the 5970 reference before it was replaced by the 5270. This platinum model features a 40mm case with a solid case back and an additional sapphire crystal exhibition back. It utilizes the manual-wind Caliber CH 27-70 Q, based on a Lemania ébauche, which is the last perpetual calendar chronograph movement Patek Philippe sourced from an external supplier. The dial is black with white gold leaf hands and a tachymeter scale. Collectors prioritize this reference for its balanced proportions and its transitional status in the brand's history. Current secondary market prices typically range from $350,000 to $450,000 depending on condition and provenance. Although the 5970 was produced in four metals, the platinum variant had the shortest production run, with an estimated total output of approximately 300 to 500 units."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek; similar platinum case profile.", "listing_stats": {"count": 9, "median": 155000.0, "low": 120000.0, "high": 340000.0, "brands": 1, "merchants": 3}, "top_listing": {"id": "h_15262733730169", "title": "Patek Philippe Perpetual Calendar Chronograph | 3970E | Platinum", "brand": "Patek Philippe", "model": "Perpetual Calendar Chronograph | 3970E | Platinum", "reference": "3970E", "price_usd": 340000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Chronograph"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/Patek_Philippe_Perpetual_Calendar_Chronograph_3970E_platinum_A_Collected_Man_London_Thumbnail_00.jpg?v=1764768413", "detail_url": "https://mostexpensivewatches.net/listing/h_15262733730169", "buy_url": "https://mostexpensivewatches.net/out/h_15262733730169", "available": false}, "auction_comp_count": 0, "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-5970p-perpetual-calendar-chrono-platinum", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-5970p-perpetual-calendar-chrono-platinum"}, {"reference": {"slug": "patek-philippe-5270p-salmon-perpetual-chrono-platinum", "brand": "Patek Philippe", "ref": "5270P-001", "model": "Perpetual Calendar Chronograph Salmon Dial", "case_material": "Platinum", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5270p-salmon-perpetual-chrono-platinum", "description": "The Patek Philippe 5270P-001 was introduced in 2018 and remained in production until its discontinuation in 2022. This reference is the first platinum iteration of the 5270 series to feature a salmon-colored dial, distinguished by blackened gold Arabic numerals and leaf-shaped hands. It houses the manual-wind Caliber CH 29-535 PS Q, the brand’s first in-house perpetual calendar chronograph movement, which replaced the Lemania-based predecessors. The 41mm platinum case includes a small diamond set between the lugs at 6 o’clock, a signature of the metal for the manufacture. Collectors value this specific model for its combination of a vintage-inspired aesthetic and modern technical reliability. On the secondary market, prices typically range from $165,000 to $210,000 depending on condition and provenance. A notable production detail is the removal of the \"chin\" on the tachymeter scale found in earlier 5270 generations, creating a cleaner dial layout."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek; similar platinum case profile.", "listing_stats": {"count": 1, "median": 195000.0, "low": 195000.0, "high": 195000.0, "brands": 1, "merchants": 1}, "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/pt/review/patek-philippe-5270p-salmon-perpetual-chrono-platinum", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-5270p-salmon-perpetual-chrono-platinum"}, {"reference": {"slug": "patek-philippe-3970ep-038", "brand": "Patek Philippe", "ref": "3970EP-038", "model": "Perpetual Calendar Chronograph Special Edition", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-3970ep-038", "description": "The Patek Philippe 3970 was produced from 1986 to 2004, succeeding the reference 2499. The 3970EP-038 is a specific platinum execution from the fourth series, distinguished by its 36mm case with a screw-down sapphire caseback and a black dial featuring diamond hour markers. It utilizes the manual-wind Caliber CH 27-70 Q, based on a Lemania 2310 ébauche, which collectors value as the first Patek Philippe perpetual calendar chronograph movement not based on a Valjoux blank. This reference represents the transition from vintage to modern proportions and manufacturing techniques. On the secondary market, the 3970EP-038 typically commands prices in the mid-to-high six-figure range, often between $180,000 and $250,000 depending on provenance. A notable production detail is that while standard platinum 3970s featured baton markers, the diamond-dial 038 variant was produced in significantly smaller quantities, increasing its rarity among fourth-series examples."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek; similar platinum case profile.", "listing_stats": {"count": 2, "median": 244500.0, "low": 149000.0, "high": 340000.0, "brands": 1, "merchants": 1}, "top_listing": {"id": "h_15262733730169", "title": "Patek Philippe Perpetual Calendar Chronograph | 3970E | Platinum", "brand": "Patek Philippe", "model": "Perpetual Calendar Chronograph | 3970E | Platinum", "reference": "3970E", "price_usd": 340000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Chronograph"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/Patek_Philippe_Perpetual_Calendar_Chronograph_3970E_platinum_A_Collected_Man_London_Thumbnail_00.jpg?v=1764768413", "detail_url": "https://mostexpensivewatches.net/listing/h_15262733730169", "buy_url": "https://mostexpensivewatches.net/out/h_15262733730169", "available": false}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-3970ep-038", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-3970ep-038"}, {"reference": {"slug": "patek-philippe-5951p-001", "brand": "Patek Philippe", "ref": "5951P-001", "model": "Perpetual Calendar Split-Seconds Chronograph", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5951p-001", "description": "The Patek Philippe 5951P-001 was introduced in 2010 and remained in production until approximately 2015. This reference is distinguished by its cushion-shaped platinum case and the caliber CHR 27-525 PS Q, which remains the thinnest column-wheel split-seconds chronograph movement with a perpetual calendar ever produced by the manufacture. Collectors prioritize this model for its technical density, as the movement measures only 7.3mm in height despite its 400 components. The dial features a black lacquer finish with red accents and white gold Breguet numerals, a departure from the brand’s traditional aesthetic. On the secondary market, the 5951P-001 typically commands prices in the mid-to-high six-figure range, often between $350,000 and $500,000 depending on provenance. A notable production detail is the single Top Wesselton diamond set into the case at 6 o'clock, signifying its platinum construction. Low production numbers make this reference a rare find at auction."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek; similar platinum case profile.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-5951p-001", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-5951p-001"}, {"reference": {"slug": "patek-philippe-5016p-010", "brand": "Patek Philippe", "ref": "5016P-010", "model": "Tourbillon Minute Repeater Perpetual Calendar", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5016p-010", "description": "The Patek Philippe Reference 5016P-010 was produced between 1993 and 2011, serving as the brand's most complicated wristwatch until the release of the Sky Moon Tourbillon. This platinum reference features a 36.8mm case housing the manual-wind Caliber R TO 27 PS QR, which integrates a minute repeater, a tourbillon, and a perpetual calendar with a retrograde date hand and moon phase. Collectors prioritize the 5016P-010 for its black dial and Breguet numerals, a configuration that distinguishes it from earlier silver-dial versions. Production was limited, with estimates suggesting approximately 200 total units across all metals over eighteen years. On the secondary market, this reference typically commands prices between $450,000 and $700,000 depending on provenance and service history. A unique steel version, Reference 5016A-010, set a significant precedent by selling for 7.3 million CHF at the 2015 Only Watch auction."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, minute; similar platinum case profile.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-5016p-010", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-5016p-010"}, {"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": 21, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, minute.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-5013r", "alternatives_url": "https://mostexpensivewatches.net/pt/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": 21, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek.", "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/pt/review/patek-philippe-5740-1g-nautilus-perpetual-calendar", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-5740-1g-nautilus-perpetual-calendar"}, {"reference": {"slug": "patek-philippe-5320g-perpetual-calendar-white-gold", "brand": "Patek Philippe", "ref": "5320G-001", "model": "Perpetual Calendar", "case_material": "18k White Gold", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5320g-perpetual-calendar-white-gold", "description": "The Patek Philippe Perpetual Calendar 5320G-001 was introduced in 2017 and remained in production until its discontinuation in 2022. Collectors prioritize this reference for its vintage-inspired aesthetic, featuring a cream-colored lacquered dial with luminous Arabic numerals and a syringe handset. The 40mm 18k white gold case is distinguished by three-tier stepped lugs, a design element influenced by the 1950s reference 2405. It utilizes the self-winding Caliber 324 S Q, which incorporates a Gyromax balance and Spiromax hairspring. The movement provides a perpetual calendar display with day and month apertures at 12 o’clock, a moon phase and date subdial at 6 o’clock, and dedicated apertures for day/night and leap year cycles. On the secondary market, the 5320G-001 typically trades between $65,000 and $85,000. While the cream dial was the launch version, Patek Philippe released a salmon-dial variant, the 5320G-011, in 2022."}, "score": 21, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek.", "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": 0, "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-5320g-perpetual-calendar-white-gold", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-5320g-perpetual-calendar-white-gold"}, {"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": 21, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek.", "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/pt/review/patek-philippe-3448", "alternatives_url": "https://mostexpensivewatches.net/pt/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": 21, "why_compare": "Same patek philippe collector universe; shared search intent: calendar, patek.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/pt/review/patek-philippe-2497", "alternatives_url": "https://mostexpensivewatches.net/pt/alternatives/patek-philippe-2497"}]}