{"reference": {"slug": "mb-f-03", "brand": "MB&F", "ref": "03", "model": "Legacy Machine Perpetual", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/mb-f-03", "description": "The MB&F Legacy Machine Perpetual in 18k white gold with a purple dial (Reference 03.WL.P) was released in 2018 as a limited edition of 25 pieces. Collectors prioritize this reference for its caliber, developed by Stephen McDonnell, which replaces the traditional grand levier system with a mechanical processor. This architecture prevents date-skipping errors and allows for independent adjustment of the year and month. The movement features a suspended 14mm balance wheel positioned above a skeletonized dial, showcasing the perpetual calendar complication. The 44mm case is constructed from 18k white gold and houses a 581-component manual-wind movement with a 72-hour power reserve. On the secondary market, this specific purple dial variant typically trades in the mid-to-high six-figure range, often exceeding $180,000 depending on condition. A notable auction result occurred in 2022 when a white gold example reached approximately $200,000 including buyer's premium."}, "listing_stats": {"count": 1, "median": 110000.0, "low": 110000.0, "high": 110000.0, "brands": 1, "merchants": 1}, "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}], "auction_lots": [{"slug": "mb-f-03-wl-p-2025", "brand": "MB&F", "reference": "03.WL.P", "model": "Legacy Machine Perpetual", "case_material": "18k White Gold", "hammer_usd": 157513, "year_sold": 2025, "venue": "Christie's Geneva", "lot_summary": "A limited edition of 25 pieces featuring a ground-up reinvention of the perpetual calendar complication developed with Stephen McDonnell.", "source_url": "https://www.christies.com/en/lot/lot-6444574", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/mb-f-03-wl-p-2025"}, {"slug": "mb-f-31r0032-2018", "brand": "MB&F", "reference": "31R0032", "model": "Horological Machine No. 3 'Sidewinder'", "case_material": "18k Rose Gold and Titanium", "hammer_usd": 41666, "year_sold": 2018, "venue": "Bonhams Hong Kong", "lot_summary": "A three-dimensional automatic calendar wristwatch with twin cones and an oversized date ring.", "source_url": "https://www.bonhams.com/auctions/25232/lot/945/", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/mb-f-31r0032-2018"}]}