{"reference": {"slug": "mb-f-20", "brand": "MB&F", "ref": "20", "model": "Horological Machine No. 2 Diamond-Set", "case_material": "18k White Gold and Titanium", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/mb-f-20", "description": "The MB&F Horological Machine No. 2 (HM2) Diamond-Set 20 was released circa 2009 as a limited edition of 20 pieces. This reference features a modular case construction combining 18k white gold and titanium, measuring 59mm x 38mm x 13mm. It utilizes the Girard-Perregaux based HM2 engine, a Jean-Marc Wiederrecht-designed movement featuring the first mechanical movement to offer instantaneous jumping hours, concentric retrograde minutes, retrograde date, and a bi-hemisphere moon phase. The \"Diamond-Set\" designation refers to the 20 diamonds totaling 0.54 carats set into the case. Collectors value the HM2 as the brand’s second-ever release, representing the early architectural era of Max Büsser’s designs. On the secondary market, this specific reference typically trades in the $60,000 to $90,000 range. A notable production detail is that the HM2 series was officially retired in 2011 with the final \"Black Box\" edition."}, "listing_stats": {"count": 4, "median": 87885.0, "low": 74000.0, "high": 148000.0, "brands": 1, "merchants": 2}, "listings": [{"id": "h_7441210376275", "title": "MB&F Perpetual Evo | #1/15 | Zirconium", "brand": "MB&F", "model": "Perpetual Evo | #1/15 | Zirconium", "reference": "CASZC_M2059", "price_usd": 148000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/MB_F_Perpetual_Evo_Zirconium_limited_edition_red_dial_limited_edition_red_dial_1_15__zirconium_A_Collected_Man_London_Thumbnail_00.jpg?v=1726068318", "detail_url": "https://mostexpensivewatches.net/listing/h_7441210376275", "buy_url": "https://mostexpensivewatches.net/out/h_7441210376275", "available": false}, {"id": "h_7435399299155", "title": "MB&F HM4 Thunderbolt | Titanium", "brand": "MB&F", "model": "HM4 Thunderbolt | Titanium", "reference": "COHTI_M2057", "price_usd": 98000.0, "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/MB_F_HM4_Thunderbolt__titanium_A_Collected_Man_London_Thumbnail_00_1.jpg?v=1725454951", "detail_url": "https://mostexpensivewatches.net/listing/h_7435399299155", "buy_url": "https://mostexpensivewatches.net/out/h_7435399299155", "available": false}, {"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_7432652390483", "title": "MB&F LMX Steel & Brass | Limited Edition | Stainless Steel", "brand": "MB&F", "model": "LMX Steel & Brass | Limited Edition | Stainless Steel", "reference": "CMASS_M2043", "price_usd": 74000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/files/098580ea47f38c06ce220fdc50f40ed9.jpg?v=1724942205", "detail_url": "https://mostexpensivewatches.net/listing/h_7432652390483", "buy_url": "https://mostexpensivewatches.net/out/h_7432652390483", "available": false}], "auction_lots": [{"slug": "mb-f-20-dwwt-2018", "brand": "MB&F", "reference": "20.DWWT", "model": "Horological Machine No. 2 Diamond-Set", "case_material": "18k White Gold and Titanium", "hammer_usd": 125000, "year_sold": 2018, "venue": "Christie's Hong Kong", "lot_summary": "An extremely rare diamond-set version of the HM2, limited to only 5 examples, featuring 635 VVS diamonds.", "source_url": "https://www.christies.com/en/lot/lot-6144574", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/mb-f-20-dwwt-2018"}, {"slug": "mb-f-20-dcttl-b-2022", "brand": "MB&F", "reference": "20.DCTTL.B", "model": "Horological Machine No. 2 (HM2)", "case_material": "Titanium", "hammer_usd": 36036, "year_sold": 2022, "venue": "Christie's Hong Kong", "lot_summary": "A titanium version of the iconic rectangular HM2, featuring jumping hours, retrograde minutes, and a bi-hemisphere moon phase.", "source_url": "https://www.christies.com/en/lot/lot-6374574", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/mb-f-20-dcttl-b-2022"}]}