{"reference": {"slug": "mb-f-51w12535", "brand": "MB&F", "ref": "51W12535", "model": "Legacy Machine 101", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/mb-f-51w12535", "description": "The MB&F Legacy Machine 101 reference 51W12535 features an 18k white gold case measuring 40mm in diameter and was produced between 2014 and approximately 2021. This reference is significant as it houses the first movement developed entirely in-house by MB&F, with finishing specifications overseen by Kari Voutilainen. The design prioritizes the 14mm suspended balance wheel positioned above a sunray blue dial, flanked by two floating white lacquer subdials for time and power reserve. Collectors value this model for its wearable dimensions compared to larger Legacy Machines and its historical role in establishing MB&F’s technical independence. On the secondary market, this reference typically trades in the $50,000 to $70,000 range depending on condition and provenance. A notable production shift occurred in 2021 when the model was updated to the \"Evolution\" series, making these original white gold references a distinct closed production chapter."}, "listing_stats": {"count": 3, "median": 77770.0, "low": 75000.0, "high": 110000.0, "brands": 1, "merchants": 3}, "listings": [{"id": "h_7400856158291", "title": "MB&F Legacy Machine Perpetual Evo | Titanium", "brand": "MB&F", "model": "Legacy Machine Perpetual Evo | Titanium", "reference": "WTI_M1886", "price_usd": 110000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Grade 5 Titanium", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/52505532a3f35f70fbf72a389aa9e2f3.jpg?v=1720090902", "detail_url": "https://mostexpensivewatches.net/listing/h_7400856158291", "buy_url": "https://mostexpensivewatches.net/out/h_7400856158291", "available": true}, {"id": "h_7226297909335", "title": "MB&F MB&F Legacy Machine Split Escapement EVO", "brand": "MB&F", "model": "MB&F Legacy Machine Split Escapement EVO", "reference": "40992012", "price_usd": 77770.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "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/AS09739_40992012_MBF_LEGACYMACHINE-6.jpg?v=1730498372", "detail_url": "https://mostexpensivewatches.net/listing/h_7226297909335", "buy_url": "https://mostexpensivewatches.net/out/h_7226297909335", "available": false}, {"id": "h_7775562072243", "title": "MB&F MB&F Legacy Machine LM101 Platinum (Pre-owned)", "brand": "MB&F", "model": "MB&F Legacy Machine LM101 Platinum (Pre-owned)", "reference": "LM101", "price_usd": 75000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "collective-horology", "merchant_name": "Collective Horology", "image_url": "https://cdn.shopify.com/s/files/1/0559/0623/8643/files/IMG_17962.jpg?v=1713389684", "detail_url": "https://mostexpensivewatches.net/listing/h_7775562072243", "buy_url": "https://mostexpensivewatches.net/out/h_7775562072243", "available": false}], "auction_lots": [{"slug": "mb-f-51w12535-2024", "brand": "MB&F", "reference": "51W12535", "model": "Legacy Machine 101", "case_material": "18k White Gold", "hammer_usd": 52920, "year_sold": 2024, "venue": "Christie's Dubai", "lot_summary": "A white gold edition of the LM101 with a grey dial, showcasing the signature 14mm suspended balance wheel.", "source_url": "https://www.christies.com/en/lot/lot-6414574", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/mb-f-51w12535-2024"}]}