{"reference": {"slug": "tudor-m7921", "brand": "Tudor", "ref": "M7921", "model": "Black Bay Ceramic One", "case_material": "Ceramic", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/tudor-m7921", "description": "The Tudor Black Bay Ceramic One reference M7921P-0001 is a unique piece produced specifically for the 2019 Only Watch charity auction. Unlike the standard production Black Bay Ceramic released later in 2021, this specific reference features a 41mm matte black ceramic case with a matching ceramic bezel insert and a unique matte black dial with blacked-out markers and hands. It is powered by the MT5602-1U manufacture caliber, which was the first Tudor movement to receive METAS Master Chronometer certification. This reference is a one-of-one production, making it a significant historical marker for the brand’s technical evolution. At the 2019 Only Watch auction, it achieved a final sale price of 350,000 CHF, which was approximately 70 times its low estimate. Because it is a unique piece held in a private collection, it does not have a standard secondary market price range."}, "listing_stats": {"count": 4, "median": 4100.0, "low": 3900.0, "high": 8950.0, "brands": 1, "merchants": 2}, "listings": [{"id": "h_8240926261427", "title": "Tudor Tudor Black Bay 58 \"Pirate\" Apple Employee Edition (Pre-owned)", "brand": "Tudor", "model": "Tudor Black Bay 58 \"Pirate\" Apple Employee Edition (Pre-owned)", "reference": "—", "price_usd": 8950.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "collective-horology", "merchant_name": "Collective Horology", "image_url": "https://cdn.shopify.com/s/files/1/0559/0623/8643/files/P4244762.jpg?v=1745548212", "detail_url": "https://mostexpensivewatches.net/listing/h_8240926261427", "buy_url": "https://mostexpensivewatches.net/out/h_8240926261427", "available": false}, {"id": "h_6893873954891", "title": "Tudor Tudor Heritage Black Bay Ceramic 79210", "brand": "Tudor", "model": "Tudor Heritage Black Bay Ceramic 79210", "reference": "79210", "price_usd": 4300.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "High-Tech Ceramic", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/products/Tudor-Heritage-Black-Bay-79210-10-10-TUD-HRBM6Q-208190a71775.jpg?v=1702585020", "detail_url": "https://mostexpensivewatches.net/listing/h_6893873954891", "buy_url": "https://mostexpensivewatches.net/out/h_6893873954891", "available": false}, {"id": "h_7036885270603", "title": "Tudor Tudor Heritage Black Bay Ceramic 79210", "brand": "Tudor", "model": "Tudor Heritage Black Bay Ceramic 79210", "reference": "79210", "price_usd": 3900.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "High-Tech Ceramic", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/files/Tudor-Heritage-Black-Bay-79210-10-10-TUD-1D5MUP-98f75d3dfeef.jpg?v=1713384008", "detail_url": "https://mostexpensivewatches.net/listing/h_7036885270603", "buy_url": "https://mostexpensivewatches.net/out/h_7036885270603", "available": false}, {"id": "h_6961540726859", "title": "Tudor Tudor Heritage Black Bay Ceramic 79210", "brand": "Tudor", "model": "Tudor Heritage Black Bay Ceramic 79210", "reference": "79210", "price_usd": 3900.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "High-Tech Ceramic", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/files/Tudor-Heritage-Black-Bay-79210-10-10-TUD-NEB049-b68724a9c4d1_baf4c92e-569e-4c0b-9263-61118e0f3752.jpg?v=1712367178", "detail_url": "https://mostexpensivewatches.net/listing/h_6961540726859", "buy_url": "https://mostexpensivewatches.net/out/h_6961540726859", "available": false}], "auction_lots": [{"slug": "tudor-m7921-001cn-2019", "brand": "Tudor", "reference": "M7921/001CN", "model": "Black Bay Ceramic One", "case_material": "Ceramic", "hammer_usd": 350000, "year_sold": 2019, "venue": "Phillips Geneva", "lot_summary": "A unique matte black ceramic version of the Black Bay, featuring a blacked-out dial and movement visible through a sapphire caseback, auctioned for Only Watch 2019.", "source_url": "https://www.phillips.com/detail/tudor/CH080219/11", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/tudor-m7921-001cn-2019"}]}