{"query": "RDDBEX0252", "brand": null, "total": 1, "limit": 10, "matches": [{"slug": "roger-dubuis-rddbex0252", "brand": "Roger Dubuis", "ref": "RDDBEX0252", "model": "Excalibur Skeletonised Double Tourbillon", "case_material": "18k White Gold", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/roger-dubuis-rddbex0252", "description": "The Roger Dubuis Excalibur Skeletonised Double Tourbillon reference RDDBEX0252 was introduced around 2010 and is no longer in current production. Collectors target this reference for the Calibre RD01SQ, a hand-wound movement featuring two flying tourbillons linked by a differential to average their rates for improved chronometric precision. The 45mm case is constructed from 18k white gold and features the signature Excalibur triple lugs and notched bezel. This model holds historical significance as a representation of the brand’s Poinçon de Genève certification, requiring every component to be finished to specific artisanal standards. On the secondary market, this reference typically trades in the $100,000 to $140,000 range depending on condition and provenance. While the RDDBEX0252 is the standard white gold iteration, a notable variant includes the RDDBEX0250, which utilizes the same skeletonized architecture but is housed in an 18k rose gold case.", "score": 205}]}