{"reference": {"slug": "iwc-6b", "brand": "IWC", "ref": "6B", "model": "Mark XI", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/iwc-6b", "description": "The IWC Mark XI 6B/346 was produced from 1948 until the early 1980s, primarily serving as a navigation timepiece for the British Royal Air Force. Collectors value this reference for its chronometer-grade Calibre 89 manual-wind movement, which features a hacking seconds function and a soft-iron inner cage for magnetic resistance. The 36mm stainless steel case houses a matte black dial characterized by a white outer minute track and the \"Broad Arrow\" military mark. Early versions featured radium luminous material, later replaced by tritium, denoted by a circled \"T\" on the dial. On the secondary market, these watches typically trade between $7,000 and $12,000 depending on provenance and military markings. A notable variant is the \"White 12\" dial, an early production run featuring a luminous numeral at the twelve o'clock position instead of the standard triangle, which commands a significant premium at auction."}, "listing_stats": {"count": 145, "median": 5400.0, "low": 3000.0, "high": 45000.0, "brands": 1, "merchants": 5}, "listings": [{"id": "h_7504443965527", "title": "IWC IWC Aquatimer 'Super Compressor'", "brand": "IWC", "model": "IWC Aquatimer 'Super Compressor'", "reference": "40970130", "price_usd": 16500.0, "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": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS10976_40970130_IWC_AQUATIMER_812-6.jpg?v=1762720382", "detail_url": "https://mostexpensivewatches.net/listing/h_7504443965527", "buy_url": "https://mostexpensivewatches.net/out/h_7504443965527", "available": true}, {"id": "h_7497922117719", "title": "IWC IWC Perpetual Calendar Chronograph", "brand": "IWC", "model": "IWC Perpetual Calendar Chronograph", "reference": "40970131", "price_usd": 13500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS11310_40970131_IWC_PERPETUALCALENDAR_IW375615-7_aeb51908-fafa-44ab-b642-e8a57aeeb1e6.jpg?v=1767628018", "detail_url": "https://mostexpensivewatches.net/listing/h_7497922117719", "buy_url": "https://mostexpensivewatches.net/out/h_7497922117719", "available": true}, {"id": "h_7534094024791", "title": "IWC IWC Mark XII Automatic", "brand": "IWC", "model": "IWC Mark XII Automatic", "reference": "40970133", "price_usd": 10500.0, "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/AS11555_40970133_IWC_MARKXII18K-7.jpg?v=1768411398", "detail_url": "https://mostexpensivewatches.net/listing/h_7534094024791", "buy_url": "https://mostexpensivewatches.net/out/h_7534094024791", "available": true}, {"id": "h_16292299047257", "title": "IWC IWC Ingenieur Automatic SL Khanjar Dial ref 3505 Steel and Gold Execution", "brand": "IWC", "model": "IWC Ingenieur Automatic SL Khanjar Dial ref 3505 Steel and Gold Execution", "reference": "3505", "price_usd": 10250.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "bulang-and-sons", "merchant_name": "Bulang & Sons", "image_url": "https://cdn.shopify.com/s/files/1/0961/8613/8969/files/W-3752IWCIngenieurAutomaticSLKhanjardial_283_1x1_38b36e15-b18c-46b8-b1f1-017a8a7f92ce.jpg?v=1778224443", "detail_url": "https://mostexpensivewatches.net/listing/h_16292299047257", "buy_url": "https://mostexpensivewatches.net/out/h_16292299047257", "available": true}, {"id": "h_7643827568727", "title": "IWC IWC Portugieser Hand-Wound Eight Days 75th Anniversary", "brand": "IWC", "model": "IWC Portugieser Hand-Wound Eight Days 75th Anniversary", "reference": "40970139", "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": ["Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS12181_40970139_IWC_PORTUGIESER8DAYS_IW510205--5.jpg?v=1779471994", "detail_url": "https://mostexpensivewatches.net/listing/h_7643827568727", "buy_url": "https://mostexpensivewatches.net/out/h_7643827568727", "available": true}, {"id": "h_7626847289431", "title": "IWC IWC Portugieser Hand-Wound Eight Days 75th Anniversary", "brand": "IWC", "model": "IWC Portugieser Hand-Wound Eight Days 75th Anniversary", "reference": "40970138", "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": ["Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS12102_40970138_IWC_PORTUGIESERHAND-WOUNDEIGHTDAYS_IWIW510205--6.jpg?v=1776771363", "detail_url": "https://mostexpensivewatches.net/listing/h_7626847289431", "buy_url": "https://mostexpensivewatches.net/out/h_7626847289431", "available": true}, {"id": "h_16380373434713", "title": "IWC IWC/Porsche design compass watch in titanium ref 3511 with Certificate of Authenticity  paper and IWC service invoice", "brand": "IWC", "model": "IWC/Porsche design compass watch in titanium ref 3511 with Certificate of Authenticity  paper and IWC service invoice", "reference": "3511", "price_usd": 5900.0, "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": "bulang-and-sons", "merchant_name": "Bulang & Sons", "image_url": "https://cdn.shopify.com/s/files/1/0961/8613/8969/files/W-3454IWCPorschedesigncompasswatch_268_1x1_65815525-5445-4c92-bf68-658561fe1936.jpg?v=1782807477", "detail_url": "https://mostexpensivewatches.net/listing/h_16380373434713", "buy_url": "https://mostexpensivewatches.net/out/h_16380373434713", "available": true}, {"id": "h_8110826848365", "title": "IWC *Unpolished* 1990s IWC Mark XII (Ref. 3241)", "brand": "IWC", "model": "*Unpolished* 1990s IWC Mark XII (Ref. 3241)", "reference": "3241", "price_usd": 4850.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "craft-and-tailored", "merchant_name": "Craft + Tailored", "image_url": "https://cdn.shopify.com/s/files/1/1104/9180/files/Img044103_59055d1a-f100-4e63-9f39-5d866e40508f.jpg?v=1782237364", "detail_url": "https://mostexpensivewatches.net/listing/h_8110826848365", "buy_url": "https://mostexpensivewatches.net/out/h_8110826848365", "available": true}, {"id": "h_6985427812461", "title": "IWC 1943 IWC Portuguese (Ref. 325) Cal. 74 \"Starry Night\" Dial W/ IWC Certificate of Authenticity", "brand": "IWC", "model": "1943 IWC Portuguese (Ref. 325) Cal. 74 \"Starry Night\" Dial W/ IWC Certificate of Authenticity", "reference": "1943", "price_usd": 45000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "craft-and-tailored", "merchant_name": "Craft + Tailored", "image_url": "https://cdn.shopify.com/s/files/1/1104/9180/files/Img014841.jpg?v=1687478300", "detail_url": "https://mostexpensivewatches.net/listing/h_6985427812461", "buy_url": "https://mostexpensivewatches.net/out/h_6985427812461", "available": false}, {"id": "h_6893997195339", "title": "IWC IWC Pilot Fliegerchronograph Keramik IW3705-03", "brand": "IWC", "model": "IWC Pilot Fliegerchronograph Keramik IW3705-03", "reference": "IW3705", "price_usd": 28225.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/products/IWC-Pilot-IW3705-03-10-10-IWC-3R5012-70e4a51cda2d.jpg?v=1701060110", "detail_url": "https://mostexpensivewatches.net/listing/h_6893997195339", "buy_url": "https://mostexpensivewatches.net/out/h_6893997195339", "available": false}, {"id": "h_6937859948619", "title": "IWC IWC Portuguese IW503203", "brand": "IWC", "model": "IWC Portuguese IW503203", "reference": "10-21-IWC-3R62HT", "price_usd": 23415.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/products/IWC-Portuguese-IW503203-10-21-IWC-3R62HT-f88ab40fde19_28f80bab-442e-450e-ba77-b8046f610507.jpg?v=1707327111", "detail_url": "https://mostexpensivewatches.net/listing/h_6937859948619", "buy_url": "https://mostexpensivewatches.net/out/h_6937859948619", "available": false}, {"id": "h_7231910477911", "title": "IWC IWC Big Pilot Top Gun Perpetual Calendar", "brand": "IWC", "model": "IWC Big Pilot Top Gun Perpetual Calendar", "reference": "40970111", "price_usd": 19950.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS09258_40970111_IWC_BIGPILOTTOPGUNPERPETUALCALENDAR_IW502902-6.jpg?v=1730498722", "detail_url": "https://mostexpensivewatches.net/listing/h_7231910477911", "buy_url": "https://mostexpensivewatches.net/out/h_7231910477911", "available": false}, {"id": "h_6879202213963", "title": "IWC IWC Portuguese Perpetual Calendar IW3442-02", "brand": "IWC", "model": "IWC Portuguese Perpetual Calendar IW3442-02", "reference": "IW3442", "price_usd": 19000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/files/IWC-Portuguese-IW3442-02-10-10-IWC-LSZF3E-6fd2395fe142.jpg?v=1715190902", "detail_url": "https://mostexpensivewatches.net/listing/h_6879202213963", "buy_url": "https://mostexpensivewatches.net/out/h_6879202213963", "available": false}, {"id": "h_8011930599533", "title": "IWC 1980s IWC Ingenieur SL 18K YG (Ref. 9230) Black \"Graph Paper\" Dial", "brand": "IWC", "model": "1980s IWC Ingenieur SL 18K YG (Ref. 9230) Black \"Graph Paper\" Dial", "reference": "9230", "price_usd": 18000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "craft-and-tailored", "merchant_name": "Craft + Tailored", "image_url": "https://cdn.shopify.com/s/files/1/1104/9180/files/Img042022.jpg?v=1773178872", "detail_url": "https://mostexpensivewatches.net/listing/h_8011930599533", "buy_url": "https://mostexpensivewatches.net/out/h_8011930599533", "available": false}, {"id": "h_15981138641241", "title": "IWC IWC Ingenieur SL ref. 9227 Linen Khanjar Dial from Original Owner Family with Box, Booklets, Original Certificate of Origin and Provenance in 18k yellow gold", "brand": "IWC", "model": "IWC Ingenieur SL ref. 9227 Linen Khanjar Dial from Original Owner Family with Box, Booklets, Original Certificate of Origin and Provenance in 18k yellow gold", "reference": "9227", "price_usd": 16250.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Yellow Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "bulang-and-sons", "merchant_name": "Bulang & Sons", "image_url": "https://cdn.shopify.com/s/files/1/0961/8613/8969/files/W-3491IWCIngenieurLinenKhanjarDialfromoriginalownerfamilywithBoxBooklets_0014_1x1_9edfaaab-582f-4942-9a9a-1aa8396edf7e.jpg?v=1764940491", "detail_url": "https://mostexpensivewatches.net/listing/h_15981138641241", "buy_url": "https://mostexpensivewatches.net/out/h_15981138641241", "available": false}, {"id": "h_16138241311065", "title": "IWC IWC Yacht club II Jumbo Automatic Black dial ref 3212", "brand": "IWC", "model": "IWC Yacht club II Jumbo Automatic Black dial ref 3212", "reference": "3212", "price_usd": 15900.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "bulang-and-sons", "merchant_name": "Bulang & Sons", "image_url": "https://cdn.shopify.com/s/files/1/0961/8613/8969/files/W-3506IWCYachtclub2Jumbo_0010_1x1_b97d9329-26bd-4bdd-9987-ebe9c36691eb.jpg?v=1772183211", "detail_url": "https://mostexpensivewatches.net/listing/h_16138241311065", "buy_url": "https://mostexpensivewatches.net/out/h_16138241311065", "available": false}, {"id": "h_6696117698643", "title": "IWC Perpetual Calendar | Da Vinci Ref. 9252 | Rose Gold", "brand": "IWC", "model": "Perpetual Calendar | Da Vinci Ref. 9252 | Rose Gold", "reference": "9252", "price_usd": 15500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Rose Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Chronograph"], "merchant_slug": "a-collected-man", "merchant_name": "A Collected Man", "image_url": "https://cdn.shopify.com/s/files/1/0606/5325/products/IWC_DaVinci_Perpetual_Calendar_Chronograph_A_Collected_Man_12.jpg?v=1643030607", "detail_url": "https://mostexpensivewatches.net/listing/h_6696117698643", "buy_url": "https://mostexpensivewatches.net/out/h_6696117698643", "available": false}, {"id": "h_6879224561739", "title": "IWC IWC Portuguese Perpetual Calendar 42 IW344203", "brand": "IWC", "model": "IWC Portuguese Perpetual Calendar 42 IW344203", "reference": "10-10-IWC-DU0KFN", "price_usd": 15500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar"], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/products/IWC-Portuguese-IW344203-10-10-IWC-DU0KFN-fffa033f5311.jpg?v=1708909297", "detail_url": "https://mostexpensivewatches.net/listing/h_6879224561739", "buy_url": "https://mostexpensivewatches.net/out/h_6879224561739", "available": false}, {"id": "h_15751365558617", "title": "IWC Porsche design by IWC Ocean 2000 issued ref. 3314", "brand": "IWC", "model": "Porsche design by IWC Ocean 2000 issued ref. 3314", "reference": "2000", "price_usd": 15250.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Grade 5 Titanium", "case_size_mm": 42.0, "movement": "Automatic", "complications": [], "merchant_slug": "bulang-and-sons", "merchant_name": "Bulang & Sons", "image_url": "https://cdn.shopify.com/s/files/1/0961/8613/8969/files/W-1541-IWC-Ocean-2000-Bund-Issued-ref-3314_001.jpg?v=1756205856", "detail_url": "https://mostexpensivewatches.net/listing/h_15751365558617", "buy_url": "https://mostexpensivewatches.net/out/h_15751365558617", "available": false}, {"id": "h_6949395005515", "title": "IWC IWC Pilot IW389106", "brand": "IWC", "model": "IWC Pilot IW389106", "reference": "10-21-IWC-VKGZB4", "price_usd": 15015.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/products/IWC-Pilot-IW389106-10-21-IWC-VKGZB4-4b6d6509be89.jpg?v=1708984040", "detail_url": "https://mostexpensivewatches.net/listing/h_6949395005515", "buy_url": "https://mostexpensivewatches.net/out/h_6949395005515", "available": false}, {"id": "h_7299500867671", "title": "IWC IWC Novecento Perpetual Calendar", "brand": "IWC", "model": "IWC Novecento Perpetual Calendar", "reference": "40970123", "price_usd": 14900.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Grade 5 Titanium", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Perpetual Calendar", "Chronograph"], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS09877_40970123_NOVECENTO_PERPERTUAL_PLAT-6.jpg?v=1730510280", "detail_url": "https://mostexpensivewatches.net/listing/h_7299500867671", "buy_url": "https://mostexpensivewatches.net/out/h_7299500867671", "available": false}, {"id": "h_6714941014099", "title": "IWC Portuguese \"Jubilee\" | Steel", "brand": "IWC", "model": "Portuguese \"Jubilee\" | Steel", "reference": "WSS_I1474", "price_usd": 12000.0, "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/products/IWC_Portugese_Jubilee_A_Collected_Man_London_15.jpg?v=1645111146", "detail_url": "https://mostexpensivewatches.net/listing/h_6714941014099", "buy_url": "https://mostexpensivewatches.net/out/h_6714941014099", "available": false}, {"id": "h_7041617264715", "title": "IWC IWC Ingenieur IW3289-02", "brand": "IWC", "model": "IWC Ingenieur IW3289-02", "reference": "IW3289", "price_usd": 11800.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/files/IWC-Ingenieur-IW3289-02-10-10-IWC-PRA097-3b8d3a59645b.jpg?v=1713474138", "detail_url": "https://mostexpensivewatches.net/listing/h_7041617264715", "buy_url": "https://mostexpensivewatches.net/out/h_7041617264715", "available": false}, {"id": "h_6894016921675", "title": "IWC IWC Big Pilot Spitfire Annual Calendar IW5027-02", "brand": "IWC", "model": "IWC Big Pilot Spitfire Annual Calendar IW5027-02", "reference": "IW5027", "price_usd": 11600.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Annual Calendar"], "merchant_slug": "hodinkee", "merchant_name": "Hodinkee Shop", "image_url": "https://cdn.shopify.com/s/files/1/0146/0732/products/IWC-Big-Pilot-Spitfire-IW5027-02-10-10-IWC-1VC4QS-7893e2db5bf4.jpg?v=1710687346", "detail_url": "https://mostexpensivewatches.net/listing/h_6894016921675", "buy_url": "https://mostexpensivewatches.net/out/h_6894016921675", "available": false}], "auction_lots": [{"slug": "iwc-6b-346-2017", "brand": "IWC", "reference": "6B/346", "model": "Mark XI", "case_material": "Stainless Steel", "hammer_usd": 7500, "year_sold": 2017, "venue": "Christie's Online", "lot_summary": "The definitive military pilot's watch issued to the RAF, featuring the legendary manual-wind Caliber 89 movement.", "source_url": "https://www.christies.com/en/lot/lot-6074832", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/iwc-6b-346-2017"}, {"slug": "iwc-6b-346-2015", "brand": "IWC", "reference": "6B/346", "model": "Mark XI", "case_material": "Stainless Steel", "hammer_usd": 6250, "year_sold": 2015, "venue": "Phillips Geneva", "lot_summary": "A legendary RAF-issued navigator's watch from 1951, powered by the highly accurate caliber 89 movement.", "source_url": "https://www.phillips.com/detail/iwc/CH080215/171", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/iwc-6b-346-2015"}]}