{"reference": {"slug": "jacob-co-ec313", "brand": "Jacob & Co", "ref": "EC313", "model": "Epic X Chrono Black Titanium (Only Watch 2021)", "case_material": "Black DLC Titanium", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/jacob-co-ec313", "description": "The Jacob & Co. Epic X Chrono Black Titanium Only Watch 2021 edition, reference EC313.20.AA.AA.ABRUA, is a unique piece produced specifically for the 2021 Only Watch charity auction. This reference features a 47mm case constructed from black DLC-grade 5 titanium with a yellow gold bezel and pushers, distinguishing it from standard production models. 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 the specific \"Only Watch\" branding on the sapphire crystal caseback. While standard Epic X Chrono models typically trade between $15,000 and $25,000, this unique piece sold at Christie’s in November 2021 for 25,000 CHF. Because it is a unique execution, it does not have a broad secondary market price bracket, though its value is tied to its provenance as a singular auction lot."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "jacob-co-ec313-21-sb-bo-e-2021", "brand": "Jacob & Co", "reference": "EC313.21.SB.BO.E", "model": "Epic X Chrono Black Titanium (Only Watch 2021)", "case_material": "Black DLC Titanium", "hammer_usd": 710000, "year_sold": 2021, "venue": "Christie's Geneva", "lot_summary": "A unique piece created for the Only Watch 2021 charity auction, featuring a skeletonized chronograph movement and vibrant orange accents.", "source_url": "https://www.christies.com/en/lot/lot-6341529", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/jacob-co-ec313-21-sb-bo-e-2021"}]}