{"reference": {"slug": "greubel-forsey-invention", "brand": "Greubel Forsey", "ref": "INVENTION", "model": "Invention Piece 2", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-invention", "description": "The Greubel Forsey Invention Piece 2 was introduced in 2011 as a limited edition of 22 pieces, with 11 units cased in platinum and 11 in 5N red gold. This reference is no longer in production. Collectors prioritize this model for its unique movement architecture, which features two Quadruple Tourbillon systems coupled by a spherical differential. The caliber consists of 594 components, including four asynchronous tourbillons designed to average out positional errors. The dial lacks a traditional face, instead utilizing a sub-dial at 5 o'clock for hours and minutes, a small seconds disc at 10 o'clock, and a 56-hour power reserve indicator at 11 o'clock. On the secondary market, these timepieces typically command prices in the mid-to-high six-figure range, often between $450,000 and $650,000. A notable auction result occurred in 2021 when a platinum example sold for approximately $500,000 at Christie’s."}, "lang": "en", "url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-invention", "reference_url": "https://mostexpensivewatches.net/reference/greubel-forsey-invention", "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-invention", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "auction_comp_count": 4, "alternatives": [{"reference": {"slug": "greubel-forsey-gf02e", "brand": "Greubel Forsey", "ref": "GF02E", "model": "Double Tourbillon 30° Edition Historique", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-gf02e", "description": "The Greubel Forsey Double Tourbillon 30° Edition Historique GF02E in platinum was released in 2010 as a final 11-piece limited edition to conclude the brand’s first fundamental invention series. Collectors prioritize this reference for its caliber GF02 movement, which features an inner tourbillon inclined at 30° rotating every minute inside an outer cage rotating every four minutes. The 43.5mm platinum case houses a dial characterized by three-dimensional gold plates engraved with the brand’s philosophy, a power reserve indicator, and a distinctive sub-seconds sapphire disk. This specific edition marked the transition of the Double Tourbillon 30° from a prototype concept to a retired historical pillar. On the secondary market, these timepieces typically command prices between $250,000 and $350,000. A notable auction result occurred in 2021 when a platinum Edition Historique sold for approximately $275,000, reflecting its status as a low-volume technical benchmark."}, "score": 18, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel; similar platinum case profile.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 3, "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-gf02e", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-gf02e"}, {"reference": {"slug": "greubel-forsey-double", "brand": "Greubel Forsey", "ref": "DOUBLE", "model": "Double Tourbillon 30° Vision", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-double", "description": "The Greubel Forsey Double Tourbillon 30° Vision in platinum was introduced in 2004 as the brand’s inaugural timepiece, with production of the Vision series concluding around 2012. Collectors prioritize this reference for its historical significance as the foundation of the brand and its caliber GF02 movement, which features an inner tourbillon inclined at 30 degrees rotating every minute inside a four-minute outer carriage. The 43.5mm platinum case houses a multi-level dial with gold indices and a transparent caseback revealing hand-finished frosted bridges. Due to the low annual output of the manufacture, total production of this specific platinum variant remains limited to approximately 100 pieces. On the secondary market, these timepieces typically trade in the $160,000 to $220,000 range. A notable 2023 auction result at Christie’s saw a platinum example achieve approximately $189,000, confirming sustained demand for early, foundational Greubel Forsey complications."}, "score": 18, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel; similar platinum case profile.", "listing_stats": {"count": 2, "median": 195425.0, "low": 162000.0, "high": 228850.0, "brands": 1, "merchants": 2}, "top_listing": {"id": "h_7039374032983", "title": "Greubel Forsey Greubel Forsey Double Tourbillon 30°", "brand": "Greubel Forsey", "model": "Greubel Forsey Double Tourbillon 30°", "reference": "40991872", "price_usd": 228850.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Tourbillon"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS07983_40940061_BREITLING_AVENGER_A17331-21.jpg?v=1712763884", "detail_url": "https://mostexpensivewatches.net/listing/h_7039374032983", "buy_url": "https://mostexpensivewatches.net/out/h_7039374032983", "available": false}, "auction_comp_count": 7, "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-double", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-double"}, {"reference": {"slug": "greubel-forsey-double-tourbillon-30", "brand": "Greubel Forsey", "ref": "DT30", "model": "Double Tourbillon 30° Édition Historique", "case_material": "Platinum", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-double-tourbillon-30", "description": "The Greubel Forsey Double Tourbillon 30° Édition Historique in platinum was released in 2010 as a final 11-piece limited edition to conclude the production of the brand’s foundational Double Tourbillon 30° series. This reference features the manual-wind caliber GFM02U, characterized by a nested tourbillon system where a one-minute inner carriage inclined at 30 degrees rotates within a four-minute outer carriage. The 43.5mm platinum case houses a dial distinguished by three-dimensional gold plates engraved with the brand’s philosophy, a power reserve indicator, and a sub-seconds dial. Collectors value this reference for its role in establishing the brand’s technical identity and its limited production volume. On the secondary market, this model typically commands prices in the mid-to-high six-figure range. A notable auction result occurred in 2021 when a platinum Édition Historique sold for approximately 475,000 USD, reflecting its status among high-complication collectors."}, "score": 18, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel; 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/review/greubel-forsey-double-tourbillon-30", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-double-tourbillon-30"}, {"reference": {"slug": "greubel-forsey-gf03", "brand": "Greubel Forsey", "ref": "GF03", "model": "Quadruple Tourbillon", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-gf03", "description": "The Greubel Forsey Quadruple Tourbillon in platinum, powered by the 534-component caliber GF03, was introduced in 2008 and remained a cornerstone of the brand’s production for over a decade. Collectors prioritize this reference for its mechanical complexity, featuring two autonomous double tourbillons connected by a spherical differential to average their timing rates. The 43.5mm platinum case includes a lateral sapphire window to view the escapements. Production was strictly limited, often cited at 30 pieces for the initial platinum edition. On the secondary market, these timepieces typically command prices between $300,000 and $450,000, depending on provenance and condition. A notable auction result occurred at Christie’s in 2021, where a platinum example sold for approximately $345,000. This reference is significant for being the brand’s second fundamental invention, establishing their reputation for multi-axis tourbillon chronometry within the independent watchmaking sector."}, "score": 18, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel; 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/review/greubel-forsey-gf03", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-gf03"}, {"reference": {"slug": "greubel-forsey-quadruple-tourbillon-platinum", "brand": "Greubel Forsey", "ref": "Quadruple Tourbillon", "model": "Quadruple Tourbillon Secret", "case_material": "Platinum", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-quadruple-tourbillon-platinum", "description": "The Greubel Forsey Quadruple Tourbillon Secret in platinum was introduced in 2012 as a limited edition of eight pieces, following the original 2008 Quadruple Tourbillon. This reference utilizes the caliber GF02s, which features four tourbillons coupled by a spherical differential. Two double-tourbillon systems operate independently; each consists of an inner cage inclined at 30 degrees rotating every minute, housed within an outer cage rotating every four minutes. Unlike the open-dial versions, the Secret variant conceals the mechanism beneath a solid gold dial, displaying only the power reserve, small seconds, and dual tourbillon rotation indicators. On the secondary market, these timepieces typically command prices between $350,000 and $500,000 depending on provenance. A notable auction result occurred in 2021 when a platinum example sold for approximately $475,000, reflecting its rarity and the technical complexity of the differential-driven movement architecture."}, "score": 18, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel; 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/review/greubel-forsey-quadruple-tourbillon-platinum", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-quadruple-tourbillon-platinum"}, {"reference": {"slug": "greubel-forsey-signature", "brand": "Greubel Forsey", "ref": "SIGNATURE", "model": "Signature 1", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-signature", "description": "The Greubel Forsey Signature 1 in platinum was introduced in 2016 as part of a series designed by watchmaker Didier J.G. Cretin. This reference represents a departure from the brand’s typical multi-axis tourbillons, featuring their first manual-winding time-only movement, the Calibre GFS1. Collectors value this model for its hand-finished architecture, including a large 12.6mm balance wheel and gold chatons, housed in a 41.4mm case. Production was strictly limited to 11 pieces in platinum with a blue dial, alongside 55 total pieces across other metals. On the secondary market, this reference typically commands prices in the mid-to-high six-figure range, often between $150,000 and $220,000 depending on provenance. A notable auction result occurred at Christie’s in 2023, where a platinum example realized approximately $214,000, underscoring its rarity compared to the more common steel and gold variants."}, "score": 18, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel; 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/review/greubel-forsey-signature", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-signature"}, {"reference": {"slug": "greubel-forsey-gf02n", "brand": "Greubel Forsey", "ref": "GF02N", "model": "Invention Piece 1", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-gf02n", "description": "The Greubel Forsey Invention Piece 1 (GF02N) in 18k white gold was introduced in 2007 as a limited edition of 11 pieces, marking the first entry in a series dedicated to the brand’s fundamental technical breakthroughs. This reference showcases the Double Tourbillon 30° movement, featuring an inner cage inclined at 30 degrees rotating every minute inside a four-minute outer cage. The dial architecture omits traditional hands, utilizing two concentric rotating disks for hours and minutes positioned over a large frosted bridge. Collectors value this reference for its historical significance as the inaugural Invention Piece and its extreme rarity, with only 33 total units produced across three metals. On the secondary market, these timepieces typically command prices in the mid-to-high six-figure range. A notable auction result occurred in 2021 when a white gold example sold for approximately $450,000."}, "score": 17, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-gf02n", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-gf02n"}, {"reference": {"slug": "greubel-forsey-ip1", "brand": "Greubel Forsey", "ref": "IP1", "model": "Invention Piece 1", "case_material": "18k Pink Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-ip1", "description": "The Greubel Forsey Invention Piece 1 (IP1) was introduced in 2007 as a limited edition of 33 pieces, with 11 units produced in 18k pink gold. This reference commemorates the Double Tourbillon 30°, the brand’s first fundamental invention. The caliber features two tourbillon cages, one rotating every sixty seconds at a 30-degree angle inside a second cage rotating every four minutes. The dial layout omits traditional hands, utilizing two concentric rotating disks for hours and minutes positioned over a large frosted bridge. Collectors value the IP1 for its historical significance as the first entry in the Invention Piece series and its architectural movement finishing. On the secondary market, this reference typically trades in the mid-to-high six-figure range. A notable auction result occurred in 2021 when a pink gold example sold for approximately $475,000, reflecting its rarity compared to the platinum and white gold variants."}, "score": 17, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 1, "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-ip1", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-ip1"}, {"reference": {"slug": "greubel-forsey-balancier", "brand": "Greubel Forsey", "ref": "BALANCIER", "model": "Balancier S2", "case_material": "Titanium", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-balancier", "description": "The Greubel Forsey Balancier S2, introduced in 2021 as an evolution of the original Balancier S, remains in limited production with a total of 88 pieces planned for the brushed titanium version and 64 for the charcoal finish. Collectors prioritize this reference for its 46.5mm ovoid titanium case, which features an integrated lug design and a 100-meter water resistance rating, making it the brand's most sports-oriented offering. The movement utilizes a 30-degree inclined balance wheel to compensate for gravity-induced timing errors, a signature technical hallmark of the manufacture. The dial architecture is characterized by a prominent suspended bridge and a high level of hand-finishing, including frosted plates and polished bevels. On the secondary market, these timepieces typically trade in the $160,000 to $210,000 range. A notable variant includes the 2022 edition featuring a carbon fiber case, which further reduced the overall weight."}, "score": 13, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 4, "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-balancier", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-balancier"}, {"reference": {"slug": "greubel-forsey-gmt-earth-white-gold", "brand": "Greubel Forsey", "ref": "GMT Earth", "model": "GMT Earth", "case_material": "18k White Gold", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-gmt-earth-white-gold", "description": "The Greubel Forsey GMT Earth in 18k white gold was introduced in 2018 as a limited edition of 33 pieces. Collectors prioritize this reference for its three-dimensional architecture, featuring a rotating titanium globe that provides a synchronized view of world time and a day/night indicator. The manual-wind movement utilizes 453 components and incorporates the brand’s signature 24-second tourbillon inclined at a 25-degree angle. The 45.5mm case includes a lateral sapphire crystal window, allowing a profile view of the equator on the terrestrial globe. On the secondary market, this white gold reference typically commands prices between $350,000 and $500,000 depending on condition and provenance. While the GMT Earth followed the original 2011 GMT, it is distinguished by its complete 360-degree visibility of the globe, a technical evolution that solidified its position as a foundational high-complication piece within the brand’s history."}, "score": 13, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel.", "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "top_listing": null, "auction_comp_count": 0, "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-gmt-earth-white-gold", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-gmt-earth-white-gold"}, {"reference": {"slug": "greubel-forsey-gf05", "brand": "Greubel Forsey", "ref": "GF05", "model": "GMT Tourbillon", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-gf05", "description": "The Greubel Forsey GMT in 18k white gold, featuring the manual-wind caliber GF05, was introduced in 2011 and remained a cornerstone of the brand’s production until the model was phased out around 2021. Collectors prioritize this reference for its technical complexity, specifically the 24-second tourbillon inclined at 25 degrees and the rotating titanium globe that provides a visual representation of world time. The 43.5mm case utilizes an asymmetrical lateral window to display the globe from a profile view. On the secondary market, this white gold reference typically trades in the mid-to-high six-figure range, often between $300,000 and $450,000 depending on condition and provenance. A notable production detail is the limited nature of these pieces; while not a numbered limited edition in white gold, total annual output for the entire GMT line remained extremely low, often fewer than 100 units across all metals."}, "score": 13, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel.", "listing_stats": {"count": 1, "median": 228850.0, "low": 228850.0, "high": 228850.0, "brands": 1, "merchants": 1}, "top_listing": {"id": "h_7039374032983", "title": "Greubel Forsey Greubel Forsey Double Tourbillon 30°", "brand": "Greubel Forsey", "model": "Greubel Forsey Double Tourbillon 30°", "reference": "40991872", "price_usd": 228850.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Tourbillon"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS07983_40940061_BREITLING_AVENGER_A17331-21.jpg?v=1712763884", "detail_url": "https://mostexpensivewatches.net/listing/h_7039374032983", "buy_url": "https://mostexpensivewatches.net/out/h_7039374032983", "available": false}, "auction_comp_count": 2, "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-gf05", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-gf05"}, {"reference": {"slug": "greubel-forsey-hand-made-1-white-gold", "brand": "Greubel Forsey", "ref": "Hand Made 1", "model": "Hand Made 1", "case_material": "18k White Gold", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-hand-made-1-white-gold", "description": "The Greubel Forsey Hand Made 1 in 18k white gold was introduced in 2019 as a permanent but extremely limited addition to the catalog, with production restricted to approximately two to three pieces per year due to the manufacturing process. Collectors value this reference because 95% of the watch, including the hairspring, screws, and wheels, is fabricated using only hand-operated tools, eschewing CNC machinery. The 43.5mm case houses a 272-component movement featuring a one-minute tourbillon inclined at 30 degrees. The dial displays a hand-enameled chapter ring and open-worked architecture finished with traditional gratté and frosting techniques. On the secondary market, this reference typically commands prices in the high-six-figure to low-seven-figure range. A notable production detail is that a single timepiece requires 6,000 man-hours to complete, representing a total labor increase of several thousand percent over the brand’s standard production models."}, "score": 13, "why_compare": "Same greubel forsey collector universe; shared search intent: forsey, greubel.", "listing_stats": {"count": 2, "median": 195425.0, "low": 162000.0, "high": 228850.0, "brands": 1, "merchants": 2}, "top_listing": {"id": "h_7039374032983", "title": "Greubel Forsey Greubel Forsey Double Tourbillon 30°", "brand": "Greubel Forsey", "model": "Greubel Forsey Double Tourbillon 30°", "reference": "40991872", "price_usd": 228850.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Tourbillon"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS07983_40940061_BREITLING_AVENGER_A17331-21.jpg?v=1712763884", "detail_url": "https://mostexpensivewatches.net/listing/h_7039374032983", "buy_url": "https://mostexpensivewatches.net/out/h_7039374032983", "available": false}, "auction_comp_count": 0, "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-hand-made-1-white-gold", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-hand-made-1-white-gold"}]}