{"reference": {"slug": "jaeger-lecoultre-233", "brand": "Jaeger-LeCoultre", "ref": "233", "model": "Reverso Gyrotourbillon 2", "case_material": "Platinum", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/jaeger-lecoultre-233", "description": "The Jaeger-LeCoultre Reverso Gyrotourbillon 2, reference 233.64.20, was released in 2008 as a limited edition of 75 pieces in platinum. Collectors prioritize this reference for the Calibre 174, which features a spherical biaxial tourbillon rotating at high speeds—the inner carriage every 18.75 seconds and the outer every 60 seconds. It is notable for incorporating a cylindrical balance spring, a feature historically reserved for marine chronometers to improve isochronism. The reversible platinum case is significantly thicker than standard Reversos to accommodate the three-dimensional movement, and the dial is skeletonized with blued steel hands and a 50-hour power reserve indicator on the reverse. On the secondary market, this reference typically commands prices in the mid-to-high six-figure range, often between $200,000 and $350,000 depending on condition. A notable production detail is that this was the first time the Gyrotourbillon complication was integrated into the rectangular Reverso case."}, "listing_stats": {"count": 1, "median": 28500.0, "low": 28500.0, "high": 28500.0, "brands": 1, "merchants": 1}, "listings": [{"id": "h_7569231380567", "title": "Jaeger-LeCoultre Jaeger-LeCoultre Polaris Alarm 'First Series'", "brand": "Jaeger-LeCoultre", "model": "Jaeger-LeCoultre Polaris Alarm 'First Series'", "reference": "—", "price_usd": 28500.0, "currency": "USD", "condition": "excellent", "box_papers": "full_set", "year": null, "case_material": "Stainless Steel", "case_size_mm": 40.0, "movement": "Automatic", "complications": [], "merchant_slug": "analog-shift", "merchant_name": "Analog/Shift", "image_url": "https://cdn.shopify.com/s/files/1/0809/1255/files/AS11460_40980127_JAEGERLECOULTRE_POLARISALARMFIRSTSERIESEUROPEANMARKET_E859--6.jpg?v=1770990941", "detail_url": "https://mostexpensivewatches.net/listing/h_7569231380567", "buy_url": "https://mostexpensivewatches.net/out/h_7569231380567", "available": false}], "auction_lots": [{"slug": "jaeger-lecoultre-233-64-20-2015", "brand": "Jaeger-LeCoultre", "reference": "233.64.20", "model": "Reverso Gyrotourbillon 2", "case_material": "Platinum", "hammer_usd": 185000, "year_sold": 2015, "venue": "Phillips Hong Kong", "lot_summary": "A massive technical achievement featuring a spherical tourbillon with a cylindrical hairspring housed in the iconic reversible case.", "source_url": "https://www.phillips.com/detail/jaeger-lecoultre/HK080115/352", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/jaeger-lecoultre-233-64-20-2015"}, {"slug": "jaeger-lecoultre-233-64-20-2025", "brand": "Jaeger-LeCoultre", "reference": "233.64.20", "model": "Reverso Gyrotourbillon 2", "case_material": "Platinum", "hammer_usd": 126000, "year_sold": 2025, "venue": "Christie's Geneva", "lot_summary": "A rare and highly impressive platinum limited edition semi-skeletonized spherical tourbillon wristwatch with 24-hour display and power reserve.", "source_url": "https://www.christies.com/en/lot/lot-6485322", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/jaeger-lecoultre-233-64-20-2025"}]}