{"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": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "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"}]}