{"reference": {"slug": "patek-philippe-5016", "brand": "Patek Philippe", "ref": "5016", "model": "Tourbillon Minute Repeater Perpetual Calendar", "case_material": "18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5016", "description": "Produced between 1993 and 2011, the Patek Philippe Reference 5016 was the manufacture’s most complicated wristwatch until the introduction of the Sky Moon Tourbillon. This reference integrates a minute repeater, a tourbillon, and a perpetual calendar with a retrograde date mechanism. The 36.8mm 18k pink gold case houses the manual-wind Caliber R TO 27 PS QI, which consists of 506 components. Collectors prioritize this reference for its traditional proportions and the technical difficulty of combining three major complications in a compact case. The silvered dial features applied gold Breguet numerals and a moon phase indicator. On the secondary market, the 5016R typically commands prices between $450,000 and $650,000 depending on provenance and condition. A unique steel version, Reference 5016A-010, set a record for the model when it sold for 7.3 million CHF at the 2015 Only Watch auction."}, "lang": "ja", "url": "https://mostexpensivewatches.net/ja/alternatives/patek-philippe-5016", "reference_url": "https://mostexpensivewatches.net/ja/reference/patek-philippe-5016", "review_url": "https://mostexpensivewatches.net/ja/review/patek-philippe-5016", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "auction_comp_count": 4, "alternatives": [{"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": 25, "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/ja/review/patek-philippe-5016p-010", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/patek-philippe-5016p-010"}, {"reference": {"slug": "patek-philippe-5101g", "brand": "Patek Philippe", "ref": "5101G", "model": "10-Day Tourbillon", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-5101g", "description": "The Patek Philippe Reference 5101G was produced between approximately 2007 and 2012, following the initial 2003 release of the platinum version. This reference is valued for its rectangular Art Deco-inspired Tonda case crafted in 18k white gold, featuring triple-stepped flanks and a sapphire crystal caseback. It houses the manual-wind Caliber TO 28-20 REC 10J PS IRM, which integrates a one-minute tourbillon with two mainspring barrels providing a 240-hour power reserve. The dial is finished in blue with applied Breguet numerals and includes a power reserve indicator at 12 o’clock and sub-seconds at 6 o’clock. On the secondary market, the 5101G typically trades in the low-to-mid six-figure range, often between $130,000 and $180,000 depending on provenance. While the platinum 5101P is more common, the 5101G represents a smaller production run, making it a rarer find for collectors of high-complication Patek Philippe form watches."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: 18k, gold; 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/ja/review/patek-philippe-5101g", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/patek-philippe-5101g"}, {"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/ja/review/patek-philippe-5013r", "alternatives_url": "https://mostexpensivewatches.net/ja/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/ja/review/patek-philippe-5740-1g-nautilus-perpetual-calendar", "alternatives_url": "https://mostexpensivewatches.net/ja/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": 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": 0, "review_url": "https://mostexpensivewatches.net/ja/review/patek-philippe-5320g-perpetual-calendar-white-gold", "alternatives_url": "https://mostexpensivewatches.net/ja/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": 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/ja/review/patek-philippe-3448", "alternatives_url": "https://mostexpensivewatches.net/ja/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/ja/review/patek-philippe-2497", "alternatives_url": "https://mostexpensivewatches.net/ja/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/ja/review/patek-philippe-3450", "alternatives_url": "https://mostexpensivewatches.net/ja/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/ja/review/patek-philippe-5270", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/patek-philippe-5270"}, {"reference": {"slug": "patek-philippe-1527", "brand": "Patek Philippe", "ref": "1527", "model": "Perpetual Calendar Chronograph", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/patek-philippe-1527", "description": "The Patek Philippe Reference 1527 was produced between 1940 and 1944, with only two known examples featuring the perpetual calendar chronograph complication. This specific 18k yellow gold reference is a precursor to the 2499, utilizing a 37.6mm case that was considered oversized for the era. It houses the Valjoux-based caliber 13''' movement and features a dial with a tachymeter scale, moon phase aperture, and date sub-dial. Collectors value this reference for its historical role as a unique prototype that defined the aesthetic of Patek Philippe’s mid-century complicated watches. Due to its extreme rarity, the watch does not have a standard secondary market bracket, though it commands high-seven-figure prices at auction. In 2010, this specific yellow gold perpetual calendar chronograph sold at Christie’s for approximately $5.7 million, establishing it as one of the most expensive vintage wristwatches ever sold."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 10, "median": 152000.0, "low": 13500.0, "high": 340000.0, "brands": 1, "merchants": 4}, "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/ja/review/patek-philippe-1527", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/patek-philippe-1527"}, {"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", "description": "The Patek Philippe Reference 1518 was produced between 1941 and 1954 as the first serially manufactured perpetual calendar chronograph. Collectors prioritize this reference for its historical significance and the Valjoux-based Caliber 13-130 movement. Of the 281 total units produced, the majority were cased in yellow gold, while approximately 58 examples were executed in 18k pink gold. These pink gold variants often feature \"pink on pink\" configurations with matching rose-toned dials. The case measures 35mm and features square chronograph pushers and a snap-on back. On the secondary market, 18k pink gold examples typically command between $1,200,000 and $2,500,000 depending on dial condition and provenance. A notable production variant includes the rare transition from the \"long\" signature to the shortened \"Patek Philippe\" branding on the dial. In 2021, a pink gold 1518 with a pink dial achieved a sale price exceeding $3,000,000 at auction."}, "score": 24, "why_compare": "Same patek philippe collector universe; shared search intent: 18k, calendar; similar gold 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": 7, "review_url": "https://mostexpensivewatches.net/ja/review/patek-philippe-1518", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/patek-philippe-1518"}, {"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", "description": "The Patek Philippe Reference 2499 was produced between 1950 and 1985, with a total output of 349 pieces over thirty-five years. Collectors prioritize this reference for its 37.5mm case diameter and the Valjoux-based caliber 13-130 manual-wind movement, which features a perpetual calendar, moon phase, and column-wheel chronograph. The 18k yellow gold version represents the majority of the production run, though it remains scarce compared to modern references. The model is categorized into four distinct series based on dial and case configurations, such as the transition from square to round chronograph pushers and the removal of the tachymeter scale in later iterations. On the secondary market, yellow gold examples typically command prices between $500,000 and over $1,000,000 depending on the series and condition. A first-series 2499 in yellow gold remains particularly sought after due to its flat rectangular pushers and viceroy-style case."}, "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": 6, "review_url": "https://mostexpensivewatches.net/ja/review/patek-philippe-2499", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/patek-philippe-2499"}]}