{"reference": {"slug": "jacob-co-ex300", "brand": "Jacob & Co", "ref": "EX300", "model": "Epic X Chrono (Only Watch 2017)", "case_material": "Black DLC Titanium", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/jacob-co-ex300", "description": "The Jacob & Co. Epic X Chrono Only Watch 2017 edition, reference EX300.21.OW.AL.A, is a unique piece produced specifically for the 2017 biennial charity auction. This specific reference features a 47mm black DLC-coated grade 5 titanium case with a yellow rubber push-down crown and a yellow rubber-coated screw-down crown for the internal rotating bezel. It is powered by the JCAA05 skeletonized self-winding chronograph caliber, which utilizes a column-wheel mechanism and offers a 48-hour power reserve. Collectors value this reference for its one-of-one status and its distinct yellow and black color scheme, which differs from standard production models. While standard Epic X Chrono models typically trade between $15,000 and $25,000 on the secondary market, this unique piece sold at the 2017 Christie’s Only Watch auction for 38,000 CHF. It remains a singular production item and is not part of the brand's current catalog."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "jacob-co-ex300-21-sb-ua-a-2017", "brand": "Jacob & Co", "reference": "EX300.21.SB.UA.A", "model": "Epic X Chrono (Only Watch 2017)", "case_material": "Black DLC Titanium", "hammer_usd": 21000, "year_sold": 2017, "venue": "Christie's Geneva", "lot_summary": "A unique piece unique created for the Only Watch 2017 charity auction, featuring a yellow and black color scheme and skeletonized movement.", "source_url": "https://www.christies.com/en/lot/lot-6107412", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/jacob-co-ex300-21-sb-ua-a-2017"}]}