{"query": "1680", "brand": null, "total": 2, "limit": 10, "matches": [{"slug": "rolex-1680", "brand": "Rolex", "ref": "1680", "model": "Submariner Prototype", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/rolex-1680", "description": "The Rolex Submariner reference 1680 in 18k white gold is a prototype produced in the early 1970s, specifically around 1973. This reference was never released for commercial production, as the standard gold Submariner of that era was manufactured exclusively in yellow gold. Collectors value this piece for its extreme rarity and its departure from standard production materials, featuring a 40mm white gold case and a matching white gold Oyster bracelet with a hidden clasp. It utilizes the COSC-certified caliber 1570 movement and typically features a blue \"nipple\" dial and a blue rotating bezel insert. Due to its status as a prototype with only three known examples identified publicly, it occupies a high-six-figure to low-seven-figure price bracket. A notable auction result occurred in 2017 when a confirmed example sold for approximately $630,000, establishing its position as one of the most expensive vintage Submariners.", "score": 199}, {"slug": "omega-168005", "brand": "Omega", "ref": "168005", "model": "Constellation", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/omega-168005", "description": "The Omega Constellation reference 168005 was produced during the 1960s, featuring the chronometer-rated caliber 561 or 564 automatic movements. While the reference is common in stainless steel and yellow gold, the 18k white gold execution is rare and sought by collectors for its \"C-Shape\" case design attributed to Gerald Genta. This specific variant typically features a sunburst silver or \"pie-pan\" dial with white gold indices and matching baton hands. The case construction includes a screw-down caseback with the Observatory medallion in relief. On the secondary market, 18k white gold examples generally command between $6,000 and $12,000 depending on the presence of an integrated white gold bracelet and overall condition. A notable production detail is the use of \"Sigma\" markings on later dials, indicating the use of solid gold components, which often increases the realized price at specialized watch auctions.", "score": 84}]}