{"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}, "lang": "en", "url": "https://mostexpensivewatches.net/listing/h_7039374032983", "alternatives_url": "https://mostexpensivewatches.net/api/v1/listing/h_7039374032983/alternatives", "lower_priced": [], "similar_listings": [], "cohort": {"count": 1, "median": 228850.0, "low": 228850.0, "high": 228850.0, "brands": 1, "merchants": 1, "listing_price": 228850.0, "position": "median", "delta_vs_median_pct": 0.0}, "reference": {"slug": "greubel-forsey-gmt-earth-white-gold", "ref": "GMT Earth", "brand": "Greubel Forsey", "model": "GMT Earth", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-gmt-earth-white-gold", "alternatives_url": "https://mostexpensivewatches.net/api/alternatives/greubel-forsey-gmt-earth-white-gold"}, "cross_reference_alternatives": [{"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": 24, "why_compare": "Same greubel forsey collector universe; shared search intent: 18k, forsey; similar gold case profile.", "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": 20, "why_compare": "Same greubel forsey collector universe; shared search intent: 18k, forsey; similar gold 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": 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"}, {"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": 20, "why_compare": "Same greubel forsey collector universe; shared search intent: 18k, forsey; 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/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": 20, "why_compare": "Same greubel forsey collector universe; shared search intent: 18k, forsey; 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/review/greubel-forsey-ip1", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-ip1"}, {"reference": {"slug": "greubel-forsey-naissance", "brand": "Greubel Forsey", "ref": "NAISSANCE", "model": "Naissance d'Une Montre 1", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-naissance", "description": "The Greubel Forsey Naissance d’Une Montre 1 was produced between 2016 and 2019 as a collaborative project between Robert Greubel, Stephen Forsey, and Michel Boulanger. This 18k white gold reference represents a technical effort to preserve traditional hand-manufacturing techniques, as the watch was constructed without the use of CNC machinery. The manual-wind movement features a one-minute tourbillon, a large balance wheel, and a power reserve of 55 hours. The dial is characterized by an off-center time display and an open-worked architecture that exposes the hand-finished bridges and wheels. Production was limited to 11 pieces globally. On the secondary market, this reference typically commands prices in the mid-to-high six-figure range. A notable auction result occurred at Christie’s in 2016, where the first prototype in white gold sold for approximately $1.46 million, with proceeds benefiting the Time Æon Foundation."}, "score": 20, "why_compare": "Same greubel forsey collector universe; shared search intent: 18k, forsey; similar gold 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-naissance", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-naissance"}, {"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": 20, "why_compare": "Same greubel forsey collector universe; shared search intent: 18k, forsey; similar gold case profile.", "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": 0, "review_url": "https://mostexpensivewatches.net/review/greubel-forsey-tourbillon-24-seconds-rose-gold", "alternatives_url": "https://mostexpensivewatches.net/alternatives/greubel-forsey-tourbillon-24-seconds-rose-gold"}]}