{"reference": {"slug": "omega-ck2998-4", "brand": "Omega", "ref": "CK2998-4", "model": "Speedmaster", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/omega-ck2998-4", "description": "The Omega Speedmaster reference CK2998-4 was produced between 1961 and 1962, representing a transitional phase in the early history of the model. Collectors prioritize this reference for its 39.7mm straight-lug case, \"Alpha\" style hands, and the manual-wind Calibre 321 movement. This specific sub-reference is distinguished by its \"Base 1000\" or \"Tachymètre\" bezel and the introduction of the \"drop-straight\" chronograph seconds hand, which replaced the earlier lollipop style. As a pre-Professional model without crown guards, it occupies a specific niche in the evolution toward the moon-watch configuration. On the secondary market, prices typically range from $25,000 to $50,000 depending on the integrity of the \"Dot Over Ninety\" bezel and dial patina. A notable production detail is that the CK2998 series was the first Omega worn in space by astronaut Wally Schirra during the Mercury-Atlas 8 mission."}, "listing_stats": {"count": 453, "median": 6250.0, "low": 3000.0, "high": 74000.0, "brands": 1, "merchants": 7}, "listings": [{"id": "h_8029446734146", "title": "OMEGA Speedmaster Moonwatch Omega Co-Axial Master Chronometer Moonphase Chronograph - 44.25 mm Platinum Case - Platinum-Gold Dial - Green Leather Strap - 304.93.44.52.99.003", "brand": "OMEGA", "model": "Speedmaster Moonwatch Omega Co-Axial Master Chronometer Moonphase Chronograph - 44.25 mm Platinum Case - Platinum-Gold Dial - Green Leather Strap - 304.93.44.52.99.003", "reference": "304.93", "price_usd": 54210.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 25.0, "movement": "Automatic", "complications": ["Chronograph", "Moon Phase"], "merchant_slug": "watch-affinity", "merchant_name": "Watch-Affinity", "image_url": "https://cdn.shopify.com/s/files/1/0683/2449/1586/products/30493445299003.jpg?v=1669756209", "detail_url": "https://mostexpensivewatches.net/listing/h_8029446734146", "buy_url": "https://mostexpensivewatches.net/out/h_8029446734146", "available": true}, {"id": "h_8029451813186", "title": "OMEGA Speedmaster Moonwatch Professional Chronograph Calibre 321 - 42 mm Platinum Case - Black Dial - Black Leather Strap - 311.93.42.30.99.001", "brand": "OMEGA", "model": "Speedmaster Moonwatch Professional Chronograph Calibre 321 - 42 mm Platinum Case - Black Dial - Black Leather Strap - 311.93.42.30.99.001", "reference": "311.93", "price_usd": 52270.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 42.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "watch-affinity", "merchant_name": "Watch-Affinity", "image_url": "https://cdn.shopify.com/s/files/1/0683/2449/1586/products/31193423099001.jpg?v=1669756256", "detail_url": "https://mostexpensivewatches.net/listing/h_8029451813186", "buy_url": "https://mostexpensivewatches.net/out/h_8029451813186", "available": true}, {"id": "h_8029446865218", "title": "OMEGA Speedmaster Moonwatch Omega Co-Axial Master Chronometer Moonphase Chronograph - 44.25 mm Platinum Case - Platinum-Gold Diamond Dial - Blue Leather Strap - 304.93.44.52.99.004", "brand": "OMEGA", "model": "Speedmaster Moonwatch Omega Co-Axial Master Chronometer Moonphase Chronograph - 44.25 mm Platinum Case - Platinum-Gold Diamond Dial - Blue Leather Strap - 304.93.44.52.99.004", "reference": "304.93", "price_usd": 47520.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Platinum", "case_size_mm": 25.0, "movement": "Automatic", "complications": ["Chronograph", "Moon Phase"], "merchant_slug": "watch-affinity", "merchant_name": "Watch-Affinity", "image_url": "https://cdn.shopify.com/s/files/1/0683/2449/1586/products/30493445299004.jpg?v=1669756211", "detail_url": "https://mostexpensivewatches.net/listing/h_8029446865218", "buy_url": "https://mostexpensivewatches.net/out/h_8029446865218", "available": true}, {"id": "h_8029446603074", "title": "OMEGA Speedmaster Moonwatch Omega Co-Axial Master Chronometer Moonphase Chronograph - 44.25 mm Platinum Case - Platinum-Gold Dial - 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44.25 mm Sedna Gold Case - Sun Brushed Blue Dial - Blue Leather Strap - 329.53.44.51.03.001", "brand": "OMEGA", "model": "Speedmaster Racing Co-Axial Master Chronograph Watch - 44.25 mm Sedna Gold Case - Sun Brushed Blue Dial - Blue Leather Strap - 329.53.44.51.03.001", "reference": "329.53", "price_usd": 23670.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "High-Tech Ceramic", "case_size_mm": 25.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "watch-affinity", "merchant_name": "Watch-Affinity", "image_url": "https://cdn.shopify.com/s/files/1/0683/2449/1586/products/32953445103001.jpg?v=1669756265", "detail_url": "https://mostexpensivewatches.net/listing/h_8029452861762", "buy_url": "https://mostexpensivewatches.net/out/h_8029452861762", "available": true}, {"id": "h_8029443785026", "title": "OMEGA Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Yellow Gold Case - Brushed Bezel - Silver Dial - Brown Leather Strap - 331.53.42.51.02.001", "brand": "OMEGA", "model": "Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Yellow Gold Case - Brushed Bezel - Silver Dial - Brown Leather Strap - 331.53.42.51.02.001", "reference": "331.53", "price_usd": 23670.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Yellow Gold", "case_size_mm": 41.5, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "watch-affinity", "merchant_name": "Watch-Affinity", "image_url": "https://cdn.shopify.com/s/files/1/0683/2449/1586/products/33153425102001.jpg?v=1669756180", "detail_url": "https://mostexpensivewatches.net/listing/h_8029443785026", "buy_url": "https://mostexpensivewatches.net/out/h_8029443785026", "available": true}, {"id": "h_8029450666306", "title": "OMEGA Speedmaster Moonwatch Co-Axial Chronograph Watch - 44.25 mm Orange Gold Case - Tachymeter Bezel - Black Dial - Black Leather Strap - 311.63.44.51.01.001", "brand": "OMEGA", "model": "Speedmaster Moonwatch Co-Axial Chronograph Watch - 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44.25 mm Black Ceramic Case - Diamond Set Ceramic Bezel - Black Ceramic Diamond Dial - Black Leather Strap - 311.98.44.51.51.001", "reference": "311.98", "price_usd": 22175.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k White Gold", "case_size_mm": 25.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "watch-affinity", "merchant_name": "Watch-Affinity", "image_url": "https://cdn.shopify.com/s/files/1/0683/2449/1586/products/31198445151001.jpg?v=1669756237", "detail_url": "https://mostexpensivewatches.net/listing/h_8029449683266", "buy_url": "https://mostexpensivewatches.net/out/h_8029449683266", "available": true}, {"id": "h_15298845507967", "title": "OMEGA Stainless steel OMEGA Speedmaster ref. 105.002 chronograph wristwatch. 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Made 1963", "reference": "105.002-62", "price_usd": 22000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "somlo", "merchant_name": "Somlo London", "image_url": "https://cdn.shopify.com/s/files/1/0161/6687/9332/files/O2682_3_f8479aa2-c21f-4d1a-99f0-bce760648096.jpg?v=1753718824", "detail_url": "https://mostexpensivewatches.net/listing/h_6982905987206", "buy_url": "https://mostexpensivewatches.net/out/h_6982905987206", "available": true}, {"id": "h_6789017862278", "title": "OMEGA Stainless steel OMEGA Speedmaster ref. 2998-62 chronograph wristwatch. Made 1962", "brand": "OMEGA", "model": "Stainless steel OMEGA Speedmaster ref. 2998-62 chronograph wristwatch. Made 1962", "reference": "2998-62", "price_usd": 22000.0, "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": "somlo", "merchant_name": "Somlo London", "image_url": "https://cdn.shopify.com/s/files/1/0161/6687/9332/files/O.2870_1.jpg?v=1766235180", "detail_url": "https://mostexpensivewatches.net/listing/h_6789017862278", "buy_url": "https://mostexpensivewatches.net/out/h_6789017862278", "available": true}, {"id": "h_8029452566850", "title": "OMEGA Speedmaster Moonwatch Apollo XVII Anniversary Limited Series Limited Edition of 272 Watch - 42 mm Yellow Gold Case - Polished Blue Ceramic Bezel - Blue Ceramic Dial - Brown Leather Strap - 311.6", "brand": "OMEGA", "model": "Speedmaster Moonwatch Apollo XVII Anniversary Limited Series Limited Edition of 272 Watch - 42 mm Yellow Gold Case - Polished Blue Ceramic Bezel - Blue Ceramic Dial - Brown Leather Strap - 311.63.42.30.03.001", "reference": "311.63", "price_usd": 20505.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Yellow Gold", "case_size_mm": 42.0, "movement": "Automatic", "complications": ["GMT / Dual Time"], "merchant_slug": "watch-affinity", "merchant_name": "Watch-Affinity", "image_url": "https://cdn.shopify.com/s/files/1/0683/2449/1586/products/31163423003001.jpg?v=1669756263", "detail_url": "https://mostexpensivewatches.net/listing/h_8029452566850", "buy_url": "https://mostexpensivewatches.net/out/h_8029452566850", "available": true}, {"id": "h_6982904512646", "title": "OMEGA Stainless steel OMEGA ref. 2998-3 Speedmaster chronograph wristwatch. Made 1963", "brand": "OMEGA", "model": "Stainless steel OMEGA ref. 2998-3 Speedmaster chronograph wristwatch. Made 1963", "reference": "2998-3", "price_usd": 20000.0, "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": "somlo", "merchant_name": "Somlo London", "image_url": "https://cdn.shopify.com/s/files/1/0161/6687/9332/files/O3188_5_cb98645d-8186-4070-91c6-812bb17dae14.jpg?v=1753700388", "detail_url": "https://mostexpensivewatches.net/listing/h_6982904512646", "buy_url": "https://mostexpensivewatches.net/out/h_6982904512646", "available": true}, {"id": "h_6982726156422", "title": "OMEGA 18ct yellow gold OMEGA ref. 145.0052 Speedmaster 'Jubilee' chronograph wristwatch. Made 1992", "brand": "OMEGA", "model": "18ct yellow gold OMEGA ref. 145.0052 Speedmaster 'Jubilee' chronograph wristwatch. Made 1992", "reference": "145.0052", "price_usd": 19000.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "18k Yellow Gold", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph"], "merchant_slug": "somlo", "merchant_name": "Somlo London", "image_url": "https://cdn.shopify.com/s/files/1/0161/6687/9332/files/O.3208_1_e887226e-a734-4d4e-aa53-4056999638c2.jpg?v=1753273612", "detail_url": "https://mostexpensivewatches.net/listing/h_6982726156422", "buy_url": "https://mostexpensivewatches.net/out/h_6982726156422", "available": true}, {"id": "h_14975897207167", "title": "OMEGA Stainless steel OMEGA Speedmaster Professional 'SpeedyMoon' chronograph. Made 1990", "brand": "OMEGA", "model": "Stainless steel OMEGA Speedmaster Professional 'SpeedyMoon' chronograph. Made 1990", "reference": "1990", "price_usd": 18500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": ["Chronograph", "Moon Phase"], "merchant_slug": "somlo", "merchant_name": "Somlo London", "image_url": "https://cdn.shopify.com/s/files/1/0161/6687/9332/files/O.3321_1.jpg?v=1741692599", "detail_url": "https://mostexpensivewatches.net/listing/h_14975897207167", "buy_url": "https://mostexpensivewatches.net/out/h_14975897207167", "available": true}, {"id": "h_8129458569325", "title": "OMEGA 1987 Omega Speedmaster Automatic (Ref. 376.0822) \"Holy Grail\"", "brand": "OMEGA", "model": "1987 Omega Speedmaster Automatic (Ref. 376.0822) \"Holy Grail\"", "reference": "376.0822", "price_usd": 18250.0, "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/Img044344copy_14c13357-5f3f-458b-b79f-0baff4383fe2.jpg?v=1782178165", "detail_url": "https://mostexpensivewatches.net/listing/h_8129458569325", "buy_url": "https://mostexpensivewatches.net/out/h_8129458569325", "available": true}], "auction_lots": [{"slug": "omega-ck2998-1-2015", "brand": "Omega", "reference": "CK2998-1", "model": "Speedmaster \"Tropical Dial\"", "case_material": "Stainless Steel", "hammer_usd": 28750, "year_sold": 2015, "venue": "Christie's New York", "lot_summary": "A second-generation Speedmaster from 1960 featuring a dial that aged to a desirable 'tropical' chocolate brown color.", "source_url": "https://www.christies.com/en/lot/lot-5959901", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/omega-ck2998-1-2015"}, {"slug": "omega-ck2998-62-2015", "brand": "Omega", "reference": "CK2998-62", "model": "Speedmaster", "case_material": "Stainless Steel", "hammer_usd": 28750, "year_sold": 2015, "venue": "Christie's New York", "lot_summary": "A well-preserved example of the reference 2998-62, retaining its original bracelet and alpha hands, highly sought after by vintage collectors.", "source_url": "https://www.christies.com/en/lot/lot-5959903", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/omega-ck2998-62-2015"}, {"slug": "omega-ck2998-4-2015", "brand": "Omega", "reference": "CK2998-4", "model": "Speedmaster", "case_material": "Stainless Steel", "hammer_usd": 20000, "year_sold": 2015, "venue": "Christie's New York", "lot_summary": "A classic 1962 Speedmaster reference 2998-4, representing the transition period of the model with its distinctive alpha hands.", "source_url": "https://www.christies.com/en/lot/lot-5959902", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/omega-ck2998-4-2015"}]}