{"reference": {"slug": "jacob-co-210", "brand": "Jacob & Co", "ref": "210", "model": "Brilliant Skeleton Northern Lights", "case_material": "18k Rose Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/jacob-co-210", "description": "The Jacob & Co. Brilliant Skeleton Northern Lights (Reference BS431.40.RD.QR.A) was introduced around 2014 as a limited production model within the brand’s high-jewelry skeleton collection. Collectors target this reference for its 44mm 18k rose gold case set with 251 round diamonds and its open-worked JCAM01 caliber, which features a 46-hour power reserve. A defining technical characteristic is the use of a red mineral crystal dial that provides a translucent view of the hand-finished movement architecture. Production was limited to 101 pieces globally, making it a rare find on the secondary market where it typically commands prices between $35,000 and $55,000 depending on condition. While the rose gold and red crystal version is the primary reference, a notable variant exists in stainless steel with a blue mineral crystal, which often appears at lower price points in the secondary luxury market."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "jacob-co-210-431-4-2019", "brand": "Jacob & Co", "reference": "210.431.4", "model": "Brilliant Skeleton Northern Lights", "case_material": "18k Rose Gold", "hammer_usd": 11985, "year_sold": 2019, "venue": "Bonhams London", "lot_summary": "A limited edition skeletonized wristwatch pavé set with 251 diamonds, featuring a green-tinted sapphire glass inspired by the Aurora Borealis.", "source_url": "https://www.bonhams.com/auctions/25447/lot/111/", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/jacob-co-210-431-4-2019"}]}