{"query": "EX300", "brand": null, "total": 1, "limit": 10, "matches": [{"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.", "score": 200}]}