{"query": "DEEP", "brand": null, "total": 2, "limit": 10, "matches": [{"slug": "rolex-deep", "brand": "Rolex", "ref": "DEEP", "model": "Deep Sea Special prototype 3", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/rolex-deep", "description": "The Rolex Deep Sea Special prototype 3 was produced in 1953 as part of a developmental series of approximately seven to ten watches designed for extreme depth testing. This specific stainless steel reference is valued for its historical role in the 1953 test dive of the Trieste bathyscaphe, where it reached 3,150 meters. Technical specifications include a caliber 1000 movement and a massive, hemispherical plexiglass crystal designed to withstand immense pressure. The case construction is significantly thicker than standard production models, featuring a reinforced caseback and elongated lugs. Due to its status as a developmental prototype, these watches rarely appear on the public market. When they do, prices typically reach the high-six-figure to low-seven-figure range. A notable auction result occurred in 2021 when a similar Deep Sea Special prototype sold for approximately 1.9 million CHF, reflecting its rarity and provenance.", "score": 199}, {"slug": "jaeger-lecoultre-e857", "brand": "Jaeger-LeCoultre", "ref": "E857", "model": "Deep Sea Alarm", "case_material": "Stainless Steel", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/jaeger-lecoultre-e857", "description": "The Jaeger-LeCoultre Deep Sea Alarm reference E857 was produced between 1959 and 1962, with a total production run of approximately 1,061 units. It is the first diving watch to incorporate an alarm function, utilizing the caliber 815 bumper automatic movement. Collectors distinguish between two primary dial variations: the \"LeCoultre\" signed version intended for the American market and the \"Jaeger-LeCoultre\" version for the European market. The 39.5mm stainless steel case features a non-rotating bezel and a 100-meter depth rating. Due to its limited production and historical significance as a pioneering alarm diver, the E857 currently commands prices between $35,000 and $60,000 on the secondary market, depending on condition and dial originality. A notable auction result occurred in 2021 when a well-preserved European-dial example sold for over $70,000. Many surviving examples exhibit significant bezel wear, making original, intact inserts a primary value driver.", "score": 72}]}