{"reference": {"slug": "blancpain-6056-3642-53b", "brand": "Blancpain", "ref": "6056-3642-53B", "model": "Villeret Perpetual Calendar", "case_material": "18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/blancpain-6056-3642-53b", "description": "The Blancpain Villeret Perpetual Calendar reference 6056-3642-53B was introduced in the early 2000s and is no longer in current production. Collectors target this reference for its 38mm 18k pink gold case and the caliber 5653 automatic movement, which provides a 100-hour power reserve. The dial features an opaline finish with applied Roman numerals and a moon phase indicator at six o'clock. A defining technical feature is the inclusion of under-lug correctors, allowing the wearer to adjust calendar indications by hand without specialized tools. On the secondary market, this reference typically trades between $18,000 and $24,000 depending on the presence of original accessories. While the 6056 series was produced in various metals, the pink gold execution is noted for its traditional aesthetic alignment with the Villeret collection's heritage. This model preceded the larger 40mm and 42mm iterations currently found in the brand's catalog."}, "lang": "it", "url": "https://mostexpensivewatches.net/it/alternatives/blancpain-6056-3642-53b", "reference_url": "https://mostexpensivewatches.net/it/reference/blancpain-6056-3642-53b", "review_url": "https://mostexpensivewatches.net/it/review/blancpain-6056-3642-53b", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "auction_comp_count": 1, "alternatives": [{"reference": {"slug": "blancpain-6263-3642-55b", "brand": "Blancpain", "ref": "6263-3642-55B", "model": "Villeret Quantième Complet", "case_material": "18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/blancpain-6263-3642-55b", "description": "The Blancpain Villeret Quantième Complet reference 6263-3642-55B is a 38mm complete calendar moonphase timepiece cased in 18k pink gold. This reference was introduced in the early 2000s and remained a staple of the Villeret collection for over a decade before being superseded by larger 40mm iterations. Collectors value this model for its traditional proportions and the caliber 6763 automatic movement, which provides a 100-hour power reserve. The dial features an opaline finish with applied Roman numerals and the signature \"smiling\" moonphase indicator at six o'clock. Unlike later versions featuring under-lug correctors, this reference utilizes recessed pushers on the case flanks for calendar adjustments. On the secondary market, this reference typically trades between $9,000 and $13,000 depending on the presence of the original box and papers. A notable production detail is the use of a stepped \"double pomme\" bezel, a hallmark of the Villeret design language."}, "score": 20, "why_compare": "Same blancpain collector universe; shared search intent: 18k, blancpain; 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/it/review/blancpain-6263-3642-55b", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/blancpain-6263-3642-55b"}, {"reference": {"slug": "blancpain-tourbillon", "brand": "Blancpain", "ref": "TOURBILLON", "model": "Villeret Tourbillon", "case_material": "18k Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/blancpain-tourbillon", "description": "The Blancpain Villeret Tourbillon in 18k gold, specifically the long-running Reference 6025, was introduced in the late 1990s and remained a catalog staple through the 2010s. Collectors prioritize this reference for the Caliber 25, an ultra-slim automatic movement featuring an eight-day power reserve and an off-center flying tourbillon at 12 o'clock. The 38mm case utilizes a double-stepped bezel design characteristic of the Villeret collection, often paired with a white grand feu enamel dial and painted Roman numerals. Secondary market prices typically range from $35,000 to $55,000 depending on the specific gold alloy and set completeness. A notable variant is the \"Squelette\" version, which features extensive hand-skeletonization of the bridges and mainplate. While production numbers were not strictly limited, the manual labor required for the movement finishing resulted in low annual output throughout its production cycle."}, "score": 20, "why_compare": "Same blancpain collector universe; shared search intent: 18k, blancpain; 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/it/review/blancpain-tourbillon", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/blancpain-tourbillon"}, {"reference": {"slug": "a-lange-s-hne-410", "brand": "A. Lange & Söhne", "ref": "410", "model": "Datograph Perpetual", "case_material": "18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/a-lange-s-hne-410", "description": "The A. Lange & Söhne Datograph Perpetual reference 410.032 in 18k pink gold was introduced in 2015 and remains in the brand’s current catalog. Collectors prioritize this reference for its integration of a column-wheel flyback chronograph with a perpetual calendar and the signature outsize date. It houses the manual-wind caliber L952.1, a 556-component movement featuring a silver-plated dial with solid silver sub-dials and luminous alpha hands. The 41mm case measures 13.5mm in thickness, offering a larger profile than the original 39mm Datograph. On the secondary market, this reference typically trades in the low-to-mid six-figure range, generally between $130,000 and $160,000 depending on condition and provenance. A notable production detail is the rapid-correction pusher at 10 o’clock, which advances all calendar displays simultaneously, a technical distinction from the separate recessed adjusters found on many high-complication perpetual calendars."}, "score": 15, "why_compare": "Shared search intent: 18k, gold; similar gold case profile.", "listing_stats": {"count": 6, "median": 196500.0, "low": 94770.0, "high": 205000.0, "brands": 1, "merchants": 2}, "top_listing": {"id": "h_7366968213591", "title": "A. Lange & Söhne A. Lange & Söhne Datograph Perpetual Calendar", "brand": "A. Lange & Söhne", "model": "A. Lange & Söhne Datograph Perpetual Calendar", "reference": "40992201", "price_usd": 94770.0, "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/AS10236_40992201_A.LANGE_SOHNE_DATOGRAPH_410.025-6.jpg?v=1739302805", "detail_url": "https://mostexpensivewatches.net/listing/h_7366968213591", "buy_url": "https://mostexpensivewatches.net/out/h_7366968213591", "available": true}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/it/review/a-lange-s-hne-410", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/a-lange-s-hne-410"}, {"reference": {"slug": "audemars-piguet-26394or-code-11-59-perpetual-calendar", "brand": "Audemars Piguet", "ref": "26394OR.OO.D321CR.01", "model": "Code 11.59 Perpetual Calendar", "case_material": "18k Pink Gold", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-26394or-code-11-59-perpetual-calendar", "description": "The Audemars Piguet Code 11.59 Perpetual Calendar reference 26394OR.OO.D321CR.01 was introduced in 2019 as part of the collection's initial launch and remains in the current catalog. This reference features an 18k pink gold case with a complex three-piece architecture, including an octagonal middle section and hollowed lugs. Collectors focus on the aventurine glass dial, which mimics a starry night sky and includes a photorealistic moon phase at 6 o’clock. It is powered by the self-winding Calibre 5134, an ultra-thin movement measuring 4.31mm in thickness that provides a 40-hour power reserve and displays the week of the year via a dedicated central hand. On the secondary market, this model typically trades in the $75,000 to $95,000 range. A notable production detail is that the aventurine dial requires a specific manufacturing process where copper inclusions are infused into glass to create the reflective effect."}, "score": 15, "why_compare": "Shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 11, "median": 98500.0, "low": 15900.0, "high": 275000.0, "brands": 1, "merchants": 4}, "top_listing": {"id": "h_7739650343121", "title": "Audemars Piguet Audemars Piguet Royal Oak Perpetual Calendar 25810OR.OO.0944OR.01", "brand": "Audemars Piguet", "model": "Audemars Piguet Royal Oak Perpetual Calendar 25810OR.OO.0944OR.01", "reference": "0944OR.01", "price_usd": 245000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Rose Gold", "case_size_mm": 39.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "material-good", "merchant_name": "Material Good", "image_url": "https://cdn.shopify.com/s/files/1/0561/5190/0369/files/Audemars_Piguet_Royal_Oak_Perpetual_Calendar_25810OR.OO.0944.01.jpg?v=1777670209", "detail_url": "https://mostexpensivewatches.net/listing/h_7739650343121", "buy_url": "https://mostexpensivewatches.net/out/h_7739650343121", "available": true}, "auction_comp_count": 0, "review_url": "https://mostexpensivewatches.net/it/review/audemars-piguet-26394or-code-11-59-perpetual-calendar", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/audemars-piguet-26394or-code-11-59-perpetual-calendar"}, {"reference": {"slug": "audemars-piguet-5516", "brand": "Audemars Piguet", "ref": "5516", "model": "Perpetual Calendar with Leap Year Indication", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-5516", "description": "Audemars Piguet produced the reference 5516 between 1955 and 1957, with a total production of only 12 units. This reference is historically significant as the first perpetual calendar wristwatch to feature a leap year indicator on the dial. The 36.5mm 18k yellow gold case houses the caliber 13VZSSQP, a manual-wind movement based on a Valjoux ebauche. Collectors distinguish between two primary dial configurations: the first three pieces featured the moon phase at 12 o’clock, while the subsequent nine units placed the moon phase at 6 o’clock with the leap year cycle at 12 o’clock. Due to its extreme rarity and technical importance, the reference 5516 commands prices in the high-six-figure to low-seven-figure range. A notable example sold at auction in 2015 for over $540,000, though current market valuations for well-preserved specimens often exceed $1,000,000."}, "score": 15, "why_compare": "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": 2, "review_url": "https://mostexpensivewatches.net/it/review/audemars-piguet-5516", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/audemars-piguet-5516"}, {"reference": {"slug": "audemars-piguet-25654ba", "brand": "Audemars Piguet", "ref": "25654BA", "model": "Royal Oak Perpetual Calendar", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-25654ba", "description": "Produced between 1982 and 1993, the Audemars Piguet Royal Oak Perpetual Calendar reference 25654BA represents an early evolution of the ultra-thin perpetual calendar complication within the Royal Oak line. Collectors prioritize this reference for its 39mm \"Jumbo\" case proportions and the caliber 2120/2800, a movement derived from a Jaeger-LeCoultre base that allowed for a case thickness of approximately 8.2mm. Unlike modern iterations, the 25654BA lacks a leap year indicator on the dial, a characteristic of early AP perpetual calendars. Approximately 422 units were manufactured in 18k yellow gold. On the secondary market, these timepieces typically trade in the $100,000 to $160,000 range depending on the presence of original paperwork and dial condition. A notable variant includes the \"Yves Klein\" electric blue smooth dial, which commands a significant premium over the standard champagne or white tapisserie versions at international auctions."}, "score": 15, "why_compare": "Shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 6, "median": 147500.0, "low": 92000.0, "high": 275000.0, "brands": 1, "merchants": 3}, "top_listing": {"id": "h_7739650343121", "title": "Audemars Piguet Audemars Piguet Royal Oak Perpetual Calendar 25810OR.OO.0944OR.01", "brand": "Audemars Piguet", "model": "Audemars Piguet Royal Oak Perpetual Calendar 25810OR.OO.0944OR.01", "reference": "0944OR.01", "price_usd": 245000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Rose Gold", "case_size_mm": 39.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "material-good", "merchant_name": "Material Good", "image_url": "https://cdn.shopify.com/s/files/1/0561/5190/0369/files/Audemars_Piguet_Royal_Oak_Perpetual_Calendar_25810OR.OO.0944.01.jpg?v=1777670209", "detail_url": "https://mostexpensivewatches.net/listing/h_7739650343121", "buy_url": "https://mostexpensivewatches.net/out/h_7739650343121", "available": true}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/it/review/audemars-piguet-25654ba", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/audemars-piguet-25654ba"}, {"reference": {"slug": "audemars-piguet-25659", "brand": "Audemars Piguet", "ref": "25659", "model": "Royal Oak Perpetual Calendar Gem-Set", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-25659", "description": "The Audemars Piguet Royal Oak Perpetual Calendar reference 25659BA was produced during the late 1980s and early 1990s. This 39mm 18k yellow gold model is distinguished by its factory gem-setting, typically featuring a diamond-set bezel and hour markers. It utilizes the ultra-thin automatic caliber 2120/2800, a movement derived from the Jaeger-LeCoultre 920 base. Collectors value this reference for its \"Jumbo\" proportions and its role in the evolution of the perpetual calendar complication within the Royal Oak line. Production numbers for gem-set variants were significantly lower than the standard 25654 or 25820 references, contributing to its scarcity. On the secondary market, these pieces generally command prices in the mid-to-high six-figure range depending on provenance and condition. A notable example featuring a \"Tuscan\" texture dial and factory diamonds sold at auction for over $400,000, reflecting the premium placed on rare dial configurations."}, "score": 15, "why_compare": "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/it/review/audemars-piguet-25659", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/audemars-piguet-25659"}, {"reference": {"slug": "audemars-piguet-25829or", "brand": "Audemars Piguet", "ref": "25829OR", "model": "Royal Oak Perpetual Calendar Openworked", "case_material": "18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-25829or", "description": "The Audemars Piguet Royal Oak Perpetual Calendar Openworked reference 25829OR was produced from the late 1990s through approximately 2012. This reference is valued for its 39mm \"Jumbo\" case proportions and the caliber 2120/2802, an ultra-thin self-winding movement visible through the sapphire dial and exhibition caseback. Unlike modern iterations, the 25829OR features a hand-finished skeletonized architecture and traditional leap year indicators without a week display. The 18k pink gold construction was produced in limited quantities compared to steel or tantalum versions, contributing to its scarcity. On the secondary market, this reference typically trades in the mid-to-high six-figure range, often between $250,000 and $450,000 depending on provenance and condition. A notable auction result occurred in 2022 when a well-preserved example sold for over $600,000, reflecting the high demand for the discontinued 39mm perpetual calendar complications within the Royal Oak lineage."}, "score": 15, "why_compare": "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/it/review/audemars-piguet-25829or", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/audemars-piguet-25829or"}, {"reference": {"slug": "audemars-piguet-25829tr", "brand": "Audemars Piguet", "ref": "25829TR", "model": "Royal Oak Perpetual Calendar Openworked", "case_material": "Tantalum and 18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-25829tr", "description": "The Audemars Piguet Royal Oak Perpetual Calendar Openworked reference 25829TR was produced from the late 1990s through the mid-2010s. This reference is distinguished by its bi-metal construction, pairing a tantalum case and outer bracelet links with 18k pink gold bezels and center links. Collectors prioritize this model for its skeletonized caliber 2120/2802, an ultra-thin automatic movement visible through the sapphire dial and exhibition caseback. The use of tantalum, a dense and difficult-to-machine refractory metal, makes this variant significantly rarer than standard steel or gold iterations. Current secondary market valuations typically fall within the $250,000 to $400,000 range depending on condition and provenance. Production records suggest that fewer than 100 units of the 25829TR were manufactured, and a notable example sold at a Phillips auction in 2021 for approximately 302,000 CHF, confirming its status as a low-volume collector piece."}, "score": 15, "why_compare": "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/it/review/audemars-piguet-25829tr", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/audemars-piguet-25829tr"}, {"reference": {"slug": "audemars-piguet-25636ba", "brand": "Audemars Piguet", "ref": "25636BA", "model": "Royal Oak Skeletonized Perpetual Calendar", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-25636ba", "description": "Produced between approximately 1986 and the mid-1990s, the Audemars Piguet Royal Oak Perpetual Calendar Openworked reference 25636BA is a significant neo-vintage reference housed in a 39mm 18k yellow gold case. Collectors prioritize this model for its ultra-thin self-winding caliber 2120/2800, which lacks a leap year indicator, a characteristic of early perpetual calendar movements. The sapphire dial reveals the hand-finished skeletonized components, while the absence of a sapphire caseback on many early examples distinguishes it from later iterations. Total production for the 25636BA is estimated at 126 units, making it rarer than its non-skeletonized counterparts. On the secondary market, prices typically occupy the mid-to-high six-figure range, depending on the presence of the original box and papers. A notable auction result occurred in 2022 when a well-preserved example sold for over $400,000, reflecting the high demand for early openworked Royal Oaks."}, "score": 15, "why_compare": "Shared search intent: 18k, calendar; similar gold case profile.", "listing_stats": {"count": 1, "median": 275000.0, "low": 275000.0, "high": 275000.0, "brands": 1, "merchants": 1}, "top_listing": {"id": "h_7404479185005", "title": "Audemars Piguet 1992 Audemars Piguet Royal Oak Quantième Perpetual Calendar 18K YG (Ref. 25636BA) Openwork \"Small Font\" Dial W/ Box, Winder, AP COA, AP Extract, AP Service Papers, & Accessories", "brand": "Audemars Piguet", "model": "1992 Audemars Piguet Royal Oak Quantième Perpetual Calendar 18K YG (Ref. 25636BA) Openwork \"Small Font\" Dial W/ Box, Winder, AP COA, AP Extract, AP Service Papers, & Accessories", "reference": "25636BA", "price_usd": 275000.0, "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": "craft-and-tailored", "merchant_name": "Craft + Tailored", "image_url": "https://cdn.shopify.com/s/files/1/1104/9180/files/Img027679copy.jpg?v=1716510327", "detail_url": "https://mostexpensivewatches.net/listing/h_7404479185005", "buy_url": "https://mostexpensivewatches.net/out/h_7404479185005", "available": false}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/it/review/audemars-piguet-25636ba", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/audemars-piguet-25636ba"}, {"reference": {"slug": "audemars-piguet-25829ba", "brand": "Audemars Piguet", "ref": "25829BA", "model": "Royal Oak Skeletonized Perpetual Calendar", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-25829ba", "description": "The Audemars Piguet Royal Oak Perpetual Calendar Openworked reference 25829BA was produced from approximately the mid-1990s until the early 2010s. This reference is constructed in 18k yellow gold with a 39mm case diameter and a thickness of 9.3mm, maintaining the \"Jumbo\" proportions favored by collectors. It features the ultra-thin self-winding caliber 2120/2802, which is visible through the sapphire dial and exhibition caseback. The movement is hand-finished with extensive skeletonization and engraving on the bridges and the 21k gold rotor. Collectors value this reference for its bridge between traditional finishing and the integrated bracelet design. On the secondary market, prices typically range from $250,000 to $350,000 depending on the presence of original accessories. Production was limited, with approximately 424 units estimated to have been produced in yellow gold. A notable 2023 auction result at Phillips reached approximately $241,000 for a 1997 example."}, "score": 15, "why_compare": "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/it/review/audemars-piguet-25829ba", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/audemars-piguet-25829ba"}, {"reference": {"slug": "breguet-3857", "brand": "Breguet", "ref": "3857", "model": "250th Anniversary Minute Repeating Perpetual Calendar Tourbillon", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/breguet-3857", "description": "The Breguet Reference 3857 was produced in 1997 as a limited edition of 300 pieces to commemorate the 250th anniversary of Abraham-Louis Breguet’s birth. This 18k yellow gold timepiece integrates three major complications: a minute repeater, a perpetual calendar, and a one-minute tourbillon. It utilizes the manual-wind Caliber 558 QP, which features a hand-engraved movement visible through a sapphire caseback. The 37mm case includes the brand’s signature coin-edge fluting and straight lugs, while the silvered gold dial displays four sub-dials and hand-guilloché patterns. Collectors value this reference for its historical significance and the density of complications within a traditional case size. On the secondary market, this reference typically trades in the low-to-mid six-figure range, often between $150,000 and $250,000 depending on condition. A notable auction result occurred at Christie’s in 2016, where a yellow gold example realized approximately $173,000."}, "score": 15, "why_compare": "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": 2, "review_url": "https://mostexpensivewatches.net/it/review/breguet-3857", "alternatives_url": "https://mostexpensivewatches.net/it/alternatives/breguet-3857"}]}