{"reference": {"slug": "breguet-3857", "brand": "Breguet", "ref": "3857", "model": "250th Anniversary Minute Repeating Perpetual Calendar Tourbillon", "case_material": "18k Yellow Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/breguet-3857", "description": "The Breguet Reference 3857 was produced in 1997 as a limited edition of 300 pieces to commemorate the 250th anniversary of Abraham-Louis Breguet’s birth. This 18k yellow gold timepiece integrates three major complications: a minute repeater, a perpetual calendar, and a one-minute tourbillon. It utilizes the manual-wind Caliber 558 QP, which features a hand-engraved movement visible through a sapphire caseback. The 37mm case includes the brand’s signature coin-edge fluting and straight lugs, while the silvered gold dial displays four sub-dials and hand-guilloché patterns. Collectors value this reference for its historical significance and the density of complications within a traditional case size. On the secondary market, this reference typically trades in the low-to-mid six-figure range, often between $150,000 and $250,000 depending on condition. A notable auction result occurred at Christie’s in 2016, where a yellow gold example realized approximately $173,000."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "breguet-3857-2014", "brand": "Breguet", "reference": "3857", "model": "250th Anniversary Minute Repeating Perpetual Calendar Tourbillon", "case_material": "18k Yellow Gold", "hammer_usd": 410800, "year_sold": 2014, "venue": "Sotheby's Hong Kong", "lot_summary": "A highly rare limited edition of only 3 pieces produced in 1997 to mark the 250th anniversary of the birth of Abraham-Louis Breguet.", "source_url": "https://www.sothebys.com/en/auctions/ecatalogue/2014/important-watches-hk0530/lot.2435.html", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/breguet-3857-2014"}, {"slug": "breguet-3857-2021", "brand": "Breguet", "reference": "3857", "model": "250th Anniversary Tourbillon", "case_material": "18k Yellow Gold", "hammer_usd": 235500, "year_sold": 2021, "venue": "Christie's Hong Kong", "lot_summary": "A grand complication created to mark the 250th anniversary of Abraham-Louis Breguet's birth, featuring a tourbillon, minute repeater, and perpetual calendar.", "source_url": "https://www.christies.com/en/lot/lot-6318544", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/breguet-3857-2021"}]}