{"query": "6240", "brand": null, "total": 1, "limit": 10, "matches": [{"slug": "rolex-6240", "brand": "Rolex", "ref": "6240", "model": "Cosmograph Daytona", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/rolex-6240", "description": "Produced between approximately 1965 and 1969, the Rolex Cosmograph Daytona reference 6240 was the first Daytona model to feature screw-down chronograph pushers, establishing the \"Oyster\" waterproof designation for the line. Collectors value this reference as a transitional prototype that bridged the gap between early pump-pusher models and the later 6263 and 6265 references. It is powered by the manual-wind Caliber 722 and was manufactured exclusively in stainless steel with a black acrylic tachymeter bezel. Due to its short production run, it is significantly rarer than subsequent manual-wind Daytonas. On the secondary market, prices typically range from $100,000 to over $250,000 depending on condition and dial configuration. A notable variant is the \"Solo\" dial, which features only the word \"Rolex\" without the \"Cosmograph\" or \"Daytona\" text, often commanding a premium at international auctions.", "score": 199}]}