{"reference": {"slug": "jacob-co-astronomia-sky", "brand": "Jacob & Co.", "ref": "AS900", "model": "Astronomia Sky", "case_material": "18k Rose Gold", "url": "https://mostexpensivewatches.net/reference/jacob-co-astronomia-sky", "description": "The Jacob & Co. Astronomia Sky AS900 in 18k rose gold was introduced in 2016 as a limited edition of 18 pieces. Collectors prioritize this reference for the JCAM11 caliber, a manual-wind movement featuring a triple-axis gravitational tourbillon, a rotating celestial vault, and a three-dimensional sidereal display. The 47mm case utilizes a sapphire crystal monoblock construction to provide visibility of the four-arm vertical movement, which includes a 288-facet Jacob-cut diamond and a magnesium globe. This reference marked a significant technical evolution for the brand by integrating astronomical complications with the rotating carousel architecture. On the secondary market, this model typically trades in the mid-to-high six-figure range, often between $400,000 and $600,000 depending on condition. A notable production detail is the celestial dial made of grade 5 titanium with 18k gold hand-engraved zodiac signs, which rotates once every sidereal year."}, "lang": "ja", "url": "https://mostexpensivewatches.net/ja/alternatives/jacob-co-astronomia-sky", "reference_url": "https://mostexpensivewatches.net/ja/reference/jacob-co-astronomia-sky", "review_url": "https://mostexpensivewatches.net/ja/review/jacob-co-astronomia-sky", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "auction_comp_count": 0, "alternatives": [{"reference": {"slug": "jacob-co-at802", "brand": "Jacob & Co", "ref": "AT802", "model": "Astronomia Art Dragon", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/jacob-co-at802", "description": "The Jacob & Co. Astronomia Art Dragon reference AT802.30.DR.UA.A is a piece-unique or highly limited production model introduced around 2018 as part of the Astronomia Art collection. Collectors value this reference for its JCAM25 manual-wind caliber, a gravitational triple-axis tourbillon featuring a four-arm movement that rotates every ten minutes. The 50mm 18k white gold case features monoblock sapphire crystal side windows to display a hand-engraved 18k rose gold dragon that weaves through the movement components. This specific execution includes a 288-facet Jacob-cut diamond and a magnesium globe. On the secondary market, these pieces typically command prices in the mid-to-high six-figure range, often between $600,000 and $800,000 depending on provenance. A notable production detail is that while the movement is standardized, the hand-painted dragon sculpture requires over three months of dedicated engraving and finishing, ensuring no two examples are identical."}, "score": 11, "why_compare": "Shared search intent: 18k, astronomia; 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/jacob-co-at802", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/jacob-co-at802"}, {"reference": {"slug": "jacob-co-astronomia-sky-rose-gold", "brand": "Jacob & Co", "ref": "Astronomia Sky", "model": "Astronomia Sky Celestial Panorama", "case_material": "18k Rose Gold", "url": "https://mostexpensivewatches.net/reference/jacob-co-astronomia-sky-rose-gold", "description": "The Jacob & Co. Astronomia Sky Celestial Panorama in 18k rose gold was introduced in 2016 as a technical evolution of the original Astronomia. This reference features the manual-wind JCAM11 caliber, a gravitational triple-axis tourbillon that rotates the entire four-arm platform every twenty minutes. Collectors value this specific model for its celestial complications, including a sidereal display on a blue grade 5 titanium base dial and a vertical month indicator. The 47mm case utilizes a sapphire crystal monoblock construction to provide 360-degree visibility of the movement. Production is limited to 18 pieces globally. On the secondary market, this reference typically commands prices in the mid-to-high six-figure range, often between $450,000 and $600,000 depending on condition. A notable production detail is the inclusion of a 288-facet \"Jacob Cut\" orange sapphire that rotates on its own axis every 60 seconds."}, "score": 11, "why_compare": "Shared search intent: 18k, astronomia; similar gold case profile.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 0, "review_url": "https://mostexpensivewatches.net/ja/review/jacob-co-astronomia-sky-rose-gold", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/jacob-co-astronomia-sky-rose-gold"}, {"reference": {"slug": "jacob-co-009", "brand": "Jacob & Co", "ref": "009", "model": "Astronomia Solar", "case_material": "18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/jacob-co-009", "description": "The Jacob & Co. Astronomia Solar 18k Pink Gold (Reference AS300.40.AS.AK.A) was introduced around 2017 as a more compact, wearable evolution of the original Astronomia. Collectors value this reference for the JCAM19 caliber, a 447-component manual-wind movement featuring a 10-minute vertical rotating platform with three arms. These arms support a flying tourbillon, a magnesium globe, and a differential-driven time display, all set against a baseplate of aventurine representing the night sky. The 44.5mm case utilizes a sapphire crystal monoblock side for 360-degree visibility. While the standard Solar is not a numbered limited edition, its complex assembly limits annual output. On the secondary market, this reference typically trades in the $180,000 to $260,000 range. A notable production detail is the \"Planets\" variant, which replaces the baseplate with semi-precious stone spheres representing the solar system, often commanding a premium at specialized auctions."}, "score": 11, "why_compare": "Shared search intent: 18k, astronomia; 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/jacob-co-009", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/jacob-co-009"}, {"reference": {"slug": "jacob-co-at100", "brand": "Jacob & Co", "ref": "AT100", "model": "Astronomia Tourbillon Bucherer BLUE", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/jacob-co-at100", "description": "The Jacob & Co. Astronomia Tourbillon Bucherer BLUE (Reference AT100.30.AA.AA.A) was released in 2019 as a limited edition of 18 pieces. Collectors value this reference for its 50mm 18k white gold case featuring four sapphire crystal windows and its Bucherer-exclusive blue color scheme. The manual-wind Caliber JCAM10 movement utilizes a four-arm carousel that rotates every twenty minutes, supporting a triple-axis gravitational tourbillon, a 288-facet sapphire \"Jacob Cut\" diamond, a magnesium globe, and a differential-driven time display. This specific collaboration represents a high-complication pillar of the brand’s modern history. On the secondary market, this reference typically commands prices in the mid-to-high six-figure range, often between $400,000 and $600,000 depending on condition. In 2022, a unique piece from this series was sent to the International Space Station and subsequently auctioned for charity, highlighting the technical durability of the movement architecture."}, "score": 11, "why_compare": "Shared search intent: 18k, astronomia; 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/jacob-co-at100", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/jacob-co-at100"}, {"reference": {"slug": "jacob-co-210", "brand": "Jacob & Co", "ref": "210", "model": "Brilliant Skeleton Northern Lights", "case_material": "18k Rose Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/jacob-co-210", "description": "The Jacob & Co. Brilliant Skeleton Northern Lights (Reference BS431.40.RD.QR.A) was introduced around 2014 as a limited production model within the brand’s high-jewelry skeleton collection. Collectors target this reference for its 44mm 18k rose gold case set with 251 round diamonds and its open-worked JCAM01 caliber, which features a 46-hour power reserve. A defining technical characteristic is the use of a red mineral crystal dial that provides a translucent view of the hand-finished movement architecture. Production was limited to 101 pieces globally, making it a rare find on the secondary market where it typically commands prices between $35,000 and $55,000 depending on condition. While the rose gold and red crystal version is the primary reference, a notable variant exists in stainless steel with a blue mineral crystal, which often appears at lower price points in the secondary luxury market."}, "score": 11, "why_compare": "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/jacob-co-210", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/jacob-co-210"}, {"reference": {"slug": "audemars-piguet-14790or", "brand": "Audemars Piguet", "ref": "14790OR", "model": "Royal Oak", "case_material": "18k Rose Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-14790or", "description": "The Audemars Piguet Royal Oak 14790OR was produced from approximately 1992 through the mid-2000s as a 36mm mid-size alternative to the \"Jumbo\" models. Collectors target this reference for its 18k rose gold construction and the ultra-thin Calibre 2225 or 2125 movements, which are based on Jaeger-LeCoultre ebauches. The 36mm case diameter is often preferred for its vintage proportions and versatility on various wrist sizes compared to modern 41mm iterations. This reference features a solid gold integrated bracelet and was available with several dial configurations, including the \"Petite Tapisserie\" and \"Grand Tapisserie\" patterns. On the secondary market, the 14790OR typically trades between $45,000 and $65,000 depending on condition and the presence of original paperwork. A notable variant is the \"Yves Klein\" blue dial, which commands a significant premium at auction due to its rarity and high contrast against the rose gold case."}, "score": 9, "why_compare": "Shared search intent: 18k, gold; similar gold case profile.", "listing_stats": {"count": 143, "median": 38000.0, "low": 3800.0, "high": 275000.0, "brands": 1, "merchants": 6}, "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/ja/review/audemars-piguet-14790or", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/audemars-piguet-14790or"}, {"reference": {"slug": "audemars-piguet-26062or", "brand": "Audemars Piguet", "ref": "26062OR", "model": "Royal Oak Offshore", "case_material": "18k Rose Gold and Carbon Fibre", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/audemars-piguet-26062or", "description": "The Audemars Piguet Royal Oak Offshore Alinghi Team Chronograph, reference 26062OR.OO.A002CA.01, was released in 2007 as a limited edition of 600 pieces to commemorate the 32nd America’s Cup. This reference features a 44mm case constructed from 18k rose gold paired with a forged carbon bezel, a material innovation pioneered by the brand during this era. It utilizes the caliber 2326/2848 self-winding movement, which includes a specialized ten-minute regatta countdown function displayed on the dial. The aesthetic is defined by a black \"Méga Tapisserie\" pattern with red accents and the Alinghi logo at the 3 o'clock position. On the secondary market, this reference typically trades between $35,000 and $50,000 depending on condition and the presence of original packaging. While the forged carbon and rose gold combination is the primary production variant, the collection also included versions in full forged carbon and platinum."}, "score": 9, "why_compare": "Shared search intent: 18k, gold; similar gold case profile.", "listing_stats": {"count": 18, "median": 24975.0, "low": 9900.0, "high": 189500.0, "brands": 1, "merchants": 5}, "top_listing": {"id": "h_7694167703761", "title": "Audemars Piguet Audemars Piguet Royal Oak Offshore Tourbillon Chronograph 26407TI.GG.A002CA.01", "brand": "Audemars Piguet", "model": "Audemars Piguet Royal Oak Offshore Tourbillon Chronograph 26407TI.GG.A002CA.01", "reference": "26407TI.", "price_usd": 189500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Grade 5 Titanium", "case_size_mm": 44.0, "movement": "Automatic", "complications": ["Tourbillon", "Chronograph"], "merchant_slug": "material-good", "merchant_name": "Material Good", "image_url": "https://cdn.shopify.com/s/files/1/0561/5190/0369/files/54-01388..jpg?v=1768943578", "detail_url": "https://mostexpensivewatches.net/listing/h_7694167703761", "buy_url": "https://mostexpensivewatches.net/out/h_7694167703761", "available": true}, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/ja/review/audemars-piguet-26062or", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/audemars-piguet-26062or"}, {"reference": {"slug": "breguet-classique-hora-mundi-5717-rose-gold", "brand": "Breguet", "ref": "5717BR/AS/9ZU", "model": "Classique Hora Mundi", "case_material": "18k Rose Gold", "url": "https://mostexpensivewatches.net/reference/breguet-classique-hora-mundi-5717-rose-gold", "description": "The Breguet Classique Hora Mundi 5717BR/AS/9ZU was introduced in 2011 and remained a staple of the brand’s high-complication catalog for approximately a decade before being succeeded by the 5727 and 5557. This 44mm 18k rose gold reference features the self-winding Calibre 77F0, which utilizes a unique mechanical memory system allowing the wearer to toggle between two pre-selected time zones, including date and day/night synchronization, with a single pusher press. The dial is characterized by a solid gold base with hand-engraved wave motifs and a translucent lacquer finish depicting the Americas. Collectors value this reference for its technical innovation in world-time complications and traditional finishing, such as the fluted caseband and soldered lugs. On the secondary market, this model typically trades between $35,000 and $50,000. While the Americas dial is common, variants featuring the European/African or Asian/Oceanic continents were also produced in limited quantities."}, "score": 9, "why_compare": "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": 0, "review_url": "https://mostexpensivewatches.net/ja/review/breguet-classique-hora-mundi-5717-rose-gold", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/breguet-classique-hora-mundi-5717-rose-gold"}, {"reference": {"slug": "breguet-3637", "brand": "Breguet", "ref": "3637", "model": "Classique Minute Repeater", "case_material": "18k Rose Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/breguet-3637", "description": "The Breguet Classique Minute Repeater reference 3637 in 18k rose gold was produced primarily during the 1990s and early 2000s and is currently discontinued. Collectors target this reference for its manual-wind Caliber 567, a movement based on a Lemania ebauche that features a traditional strike governor and hand-finished components visible through a sapphire caseback. The dial is characterized by solid gold construction with hand-guilloché patterns, Roman numerals, and blued steel Breguet hands. The 36mm case includes the brand’s signature coin-edge fluting and straight lugs with screw-bars. On the secondary market, this reference typically trades in the $65,000 to $90,000 range depending on the presence of original documentation. A notable production detail is the inclusion of a \"jump hour\" variant, reference 3637BA, though the standard minute repeater remains the foundational complication for this specific lineage of neo-vintage Breguet timepieces."}, "score": 9, "why_compare": "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/breguet-3637", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/breguet-3637"}, {"reference": {"slug": "cartier-baignoire-allongee-rose-gold", "brand": "Cartier", "ref": "W8000007", "model": "Baignoire Allongée", "case_material": "18k Rose Gold", "url": "https://mostexpensivewatches.net/reference/cartier-baignoire-allongee-rose-gold", "description": "The Cartier Baignoire Allongée reference W8000007 is a large-model timepiece crafted in 18k rose gold, produced primarily during the late 2000s and early 2010s. Collectors prioritize this reference for its elongated 47mm x 21mm curved case and the manual-winding Calibre 1917 MC, which maintains a slim profile compared to quartz iterations. The dial features traditional silvered opaline finishing with Roman numerals and blued-steel sword-shaped hands. This specific reference represents the modern evolution of the 1960s \"London\" Baignoire Allongée, bridging the gap between vintage aesthetics and contemporary manufacturing standards. On the secondary market, the W8000007 typically commands prices between $18,000 and $26,000 depending on the presence of original box and papers. While the standard model features a smooth bezel, a notable variant of this reference includes a factory diamond-set bezel, which significantly increases the valuation at international auction houses."}, "score": 9, "why_compare": "Shared search intent: 18k, gold; similar gold case profile.", "listing_stats": {"count": 2, "median": 38350.0, "low": 37850.0, "high": 38850.0, "brands": 1, "merchants": 1}, "top_listing": {"id": "h_7243878039639", "title": "Cartier Cartier Baignoire Allongee", "brand": "Cartier", "model": "Cartier Baignoire Allongee", "reference": "40950283", "price_usd": 38850.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Yellow Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS09568_40950283_CARTIER_BAIGNOIREYGDIAALLONGEE_2583-7.jpg?v=1730499662", "detail_url": "https://mostexpensivewatches.net/listing/h_7243878039639", "buy_url": "https://mostexpensivewatches.net/out/h_7243878039639", "available": false}, "auction_comp_count": 0, "review_url": "https://mostexpensivewatches.net/ja/review/cartier-baignoire-allongee-rose-gold", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/cartier-baignoire-allongee-rose-gold"}, {"reference": {"slug": "fp-journe-centigraphe-souverain-rose-gold", "brand": "F.P. Journe", "ref": "Centigraphe Souverain", "model": "Centigraphe Souverain", "case_material": "18k Rose Gold", "url": "https://mostexpensivewatches.net/reference/fp-journe-centigraphe-souverain-rose-gold", "description": "The F.P. Journe Centigraphe Souverain in 18k rose gold was introduced in 2008 and remained in the catalog until the line was redesigned in 2017. Collectors prioritize this reference for the Calibre 1506, a manual-wind movement constructed from 18k rose gold that features a patented mechanism capable of measuring elapsed time down to 1/100th of a second. The dial is characterized by three sub-dials with red tachymetric scales, and the case utilizes a unique rocker-actuator at the 2 o’clock position rather than traditional pushers to control the chronograph functions. Early examples often feature \"shiny\" dials that are highly sought after for their specific texture. On the secondary market, this reference typically trades in the $100,000 to $160,000 range. A notable production detail is the \"F\" engraving on the rocker, which was omitted in later iterations of the model."}, "score": 9, "why_compare": "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/fp-journe-centigraphe-souverain-rose-gold", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/fp-journe-centigraphe-souverain-rose-gold"}, {"reference": {"slug": "greubel-forsey-tourbillon-24-seconds-rose-gold", "brand": "Greubel Forsey", "ref": "Tourbillon 24 Seconds", "model": "Tourbillon 24 Secondes Contemporain", "case_material": "18k Rose Gold", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-tourbillon-24-seconds-rose-gold", "description": "The Greubel Forsey Tourbillon 24 Secondes Contemporain in 18k rose gold was introduced around 2012 and is no longer in regular production. Collectors prioritize this reference for its Calibre GF01c movement, which features a fast-rotating tourbillon inclined at a 25-degree angle to compensate for gravity in various positions. The design is distinguished by its multi-level dial architecture, featuring a transparent synthetic sapphire hour-circle and a prominent power reserve indicator at 4 o'clock. The 43.5mm case houses a movement with 267 components and a 72-hour power reserve. This specific rose gold execution was limited to 33 pieces, contributing to its scarcity. On the secondary market, this reference typically commands prices in the low-to-mid six-figure range, often between $180,000 and $250,000 depending on condition. A notable 2012 variant, the \"Edition Sertie,\" featured baguette-cut diamonds, though the standard rose gold model remains the core collector choice."}, "score": 9, "why_compare": "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": 0, "review_url": "https://mostexpensivewatches.net/ja/review/greubel-forsey-tourbillon-24-seconds-rose-gold", "alternatives_url": "https://mostexpensivewatches.net/ja/alternatives/greubel-forsey-tourbillon-24-seconds-rose-gold"}]}